diff --git a/.travis.yml b/.travis.yml
index dbcb00ff8..b5c49048b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,7 @@ branches:
     - master
     - coverity_scan
     - /openmw-.*$/
+    - test-release-build-on-travis
 env:
   global:
   - macos_qt_formula=qt@5.5
diff --git a/apps/essimporter/converter.cpp b/apps/essimporter/converter.cpp
index a428a8c71..68ee93c89 100644
--- a/apps/essimporter/converter.cpp
+++ b/apps/essimporter/converter.cpp
@@ -137,7 +137,7 @@ namespace ESSImport
         osgDB::ReaderWriter* readerwriter = osgDB::Registry::instance()->getReaderWriterForExtension("png");
         if (!readerwriter)
         {
-            std::cerr << "can't write global map image, no png readerwriter found" << std::endl;
+            std::cerr << "Error: can't write global map image, no png readerwriter found" << std::endl;
             return;
         }
 
@@ -146,7 +146,7 @@ namespace ESSImport
         osgDB::ReaderWriter::WriteResult result = readerwriter->writeImage(*image2, ostream);
         if (!result.success())
         {
-            std::cerr << "can't write global map image: " << result.message() << " code " << result.status() << std::endl;
+            std::cerr << "Error: can't write global map image: " << result.message() << " code " << result.status() << std::endl;
             return;
         }
 
diff --git a/apps/essimporter/importer.cpp b/apps/essimporter/importer.cpp
index a420d08da..c27e15a3e 100644
--- a/apps/essimporter/importer.cpp
+++ b/apps/essimporter/importer.cpp
@@ -38,7 +38,7 @@ namespace
     {
         if (fileHeader.mSCRS.size() != 128*128*4)
         {
-            std::cerr << "unexpected screenshot size " << std::endl;
+            std::cerr << "Error: unexpected screenshot size " << std::endl;
             return;
         }
 
@@ -66,14 +66,14 @@ namespace
         osgDB::ReaderWriter* readerwriter = osgDB::Registry::instance()->getReaderWriterForExtension("jpg");
         if (!readerwriter)
         {
-            std::cerr << "can't write screenshot: no jpg readerwriter found" << std::endl;
+            std::cerr << "Error: can't write screenshot: no jpg readerwriter found" << std::endl;
             return;
         }
 
         osgDB::ReaderWriter::WriteResult result = readerwriter->writeImage(*image, ostream);
         if (!result.success())
         {
-            std::cerr << "can't write screenshot: " << result.message() << " code " << result.status() << std::endl;
+            std::cerr << "Error: can't write screenshot: " << result.message() << " code " << result.status() << std::endl;
             return;
         }
 
@@ -333,7 +333,7 @@ namespace ESSImport
                 if (unknownRecords.insert(n.intval).second)
                 {
                     std::ios::fmtflags f(std::cerr.flags());
-                    std::cerr << "unknown record " << n.toString() << " (0x" << std::hex << esm.getFileOffset() << ")" << std::endl;
+                    std::cerr << "Error: unknown record " << n.toString() << " (0x" << std::hex << esm.getFileOffset() << ")" << std::endl;
                     std::cerr.flags(f);
                 }
 
diff --git a/apps/openmw/engine.cpp b/apps/openmw/engine.cpp
index cf57f5623..0895c92d5 100644
--- a/apps/openmw/engine.cpp
+++ b/apps/openmw/engine.cpp
@@ -452,16 +452,16 @@ void OMW::Engine::setWindowIcon()
     std::string windowIcon = (mResDir / "mygui" / "openmw.png").string();
     windowIconStream.open(windowIcon, std::ios_base::in | std::ios_base::binary);
     if (windowIconStream.fail())
-        std::cerr << "Failed to open " << windowIcon << std::endl;
+        std::cerr << "Error: Failed to open " << windowIcon << std::endl;
     osgDB::ReaderWriter* reader = osgDB::Registry::instance()->getReaderWriterForExtension("png");
     if (!reader)
     {
-        std::cerr << "Failed to read window icon, no png readerwriter found" << std::endl;
+        std::cerr << "Error: Failed to read window icon, no png readerwriter found" << std::endl;
         return;
     }
     osgDB::ReaderWriter::ReadResult result = reader->readImage(windowIconStream);
     if (!result.success())
-        std::cerr << "Failed to read " << windowIcon << ": " << result.message() << " code " << result.status() << std::endl;
+        std::cerr << "Error: Failed to read " << windowIcon << ": " << result.message() << " code " << result.status() << std::endl;
     else
     {
         osg::ref_ptr<osg::Image> image = result.getImage();
@@ -636,14 +636,14 @@ public:
         osgDB::ReaderWriter* readerwriter = osgDB::Registry::instance()->getReaderWriterForExtension(mScreenshotFormat);
         if (!readerwriter)
         {
-            std::cerr << "Can't write screenshot, no '" << mScreenshotFormat << "' readerwriter found" << std::endl;
+            std::cerr << "Error: Can't write screenshot, no '" << mScreenshotFormat << "' readerwriter found" << std::endl;
             return;
         }
 
         osgDB::ReaderWriter::WriteResult result = readerwriter->writeImage(image, outStream);
         if (!result.success())
         {
-            std::cerr << "Can't write screenshot: " << result.message() << " code " << result.status() << std::endl;
+            std::cerr << "Error: Can't write screenshot: " << result.message() << " code " << result.status() << std::endl;
         }
     }
 
diff --git a/apps/openmw/main.cpp b/apps/openmw/main.cpp
index ca835ad51..df26780a9 100644
--- a/apps/openmw/main.cpp
+++ b/apps/openmw/main.cpp
@@ -147,7 +147,7 @@ bool parseOptions (int argc, char** argv, OMW::Engine& engine, Files::Configurat
             ("fallback", bpo::value<FallbackMap>()->default_value(FallbackMap(), "")
             ->multitoken()->composing(), "fallback values")
 
-        ("no-grab", "Don't grab mouse cursor")
+        ("no-grab", bpo::value<bool>()->implicit_value(true)->default_value(false), "Don't grab mouse cursor")
 
         ("export-fonts", bpo::value<bool>()->implicit_value(true)
             ->default_value(false), "Export Morrowind .fnt fonts to PNG image and XML file in current directory")
@@ -185,7 +185,7 @@ bool parseOptions (int argc, char** argv, OMW::Engine& engine, Files::Configurat
     Version::Version v = Version::getOpenmwVersion(variables["resources"].as<Files::EscapeHashString>().toStdString());
     std::cout << v.describe() << std::endl;
 
-    engine.setGrabMouse(!variables.count("no-grab"));
+    engine.setGrabMouse(!variables["no-grab"].as<bool>());
 
     // Font encoding settings
     std::string encoding(variables["encoding"].as<Files::EscapeHashString>().toStdString());
@@ -234,7 +234,7 @@ bool parseOptions (int argc, char** argv, OMW::Engine& engine, Files::Configurat
     engine.setCell(variables["start"].as<Files::EscapeHashString>().toStdString());
     engine.setSkipMenu (variables["skip-menu"].as<bool>(), variables["new-game"].as<bool>());
     if (!variables["skip-menu"].as<bool>() && variables["new-game"].as<bool>())
-        std::cerr << "new-game used without skip-menu -> ignoring it" << std::endl;
+        std::cerr << "Warning: new-game used without skip-menu -> ignoring it" << std::endl;
 
     // scripts
     engine.setCompileAll(variables["script-all"].as<bool>());
diff --git a/apps/openmw/mwdialogue/dialoguemanagerimp.cpp b/apps/openmw/mwdialogue/dialoguemanagerimp.cpp
index 29bbc80f8..254bc7d47 100644
--- a/apps/openmw/mwdialogue/dialoguemanagerimp.cpp
+++ b/apps/openmw/mwdialogue/dialoguemanagerimp.cpp
@@ -238,7 +238,7 @@ namespace MWDialogue
         if (!success)
         {
             std::cerr
-                << "compiling failed (dialogue script)" << std::endl
+                << "Warning: compiling failed (dialogue script)" << std::endl
                 << cmd
                 << std::endl << std::endl;
         }
diff --git a/apps/openmw/mwgui/charactercreation.cpp b/apps/openmw/mwgui/charactercreation.cpp
index d72e6627f..9464daaf6 100644
--- a/apps/openmw/mwgui/charactercreation.cpp
+++ b/apps/openmw/mwgui/charactercreation.cpp
@@ -274,7 +274,7 @@ namespace MWGui
         }
         catch (std::exception& e)
         {
-            std::cerr << "Failed to create chargen window: " << e.what() << std::endl;
+            std::cerr << "Error: Failed to create chargen window: " << e.what() << std::endl;
         }
     }
 
@@ -592,7 +592,7 @@ namespace MWGui
                     mGenerateClass = "Mage";
                 else
                 {
-                    std::cerr << "Failed to deduce class from chosen answers in generate class dialog" << std::endl;
+                    std::cout << "Failed to deduce class from chosen answers in generate class dialog" << std::endl;
                     mGenerateClass = "Thief";
                 }
             }
diff --git a/apps/openmw/mwgui/savegamedialog.cpp b/apps/openmw/mwgui/savegamedialog.cpp
index 5187c3043..f93d1cc0a 100644
--- a/apps/openmw/mwgui/savegamedialog.cpp
+++ b/apps/openmw/mwgui/savegamedialog.cpp
@@ -405,14 +405,14 @@ namespace MWGui
         osgDB::ReaderWriter* readerwriter = osgDB::Registry::instance()->getReaderWriterForExtension("jpg");
         if (!readerwriter)
         {
-            std::cerr << "Can't open savegame screenshot, no jpg readerwriter found" << std::endl;
+            std::cerr << "Error: Can't open savegame screenshot, no jpg readerwriter found" << std::endl;
             return;
         }
 
         osgDB::ReaderWriter::ReadResult result = readerwriter->readImage(instream);
         if (!result.success())
         {
-            std::cerr << "Failed to read savegame screenshot: " << result.message() << " code " << result.status() << std::endl;
+            std::cerr << "Error: Failed to read savegame screenshot: " << result.message() << " code " << result.status() << std::endl;
             return;
         }
 
diff --git a/apps/openmw/mwgui/settingswindow.cpp b/apps/openmw/mwgui/settingswindow.cpp
index 3211473e2..c167164d9 100644
--- a/apps/openmw/mwgui/settingswindow.cpp
+++ b/apps/openmw/mwgui/settingswindow.cpp
@@ -33,7 +33,7 @@ namespace
         if (val == "linear")  return "Trilinear";
         if (val == "nearest") return "Bilinear";
         if (val != "none")
-            std::cerr<< "Invalid texture mipmap option: "<<val <<std::endl;
+            std::cerr<< "Warning: Invalid texture mipmap option: "<<val <<std::endl;
         return "Other";
     }
 
diff --git a/apps/openmw/mwgui/sortfilteritemmodel.cpp b/apps/openmw/mwgui/sortfilteritemmodel.cpp
index 0d7053404..09438b950 100644
--- a/apps/openmw/mwgui/sortfilteritemmodel.cpp
+++ b/apps/openmw/mwgui/sortfilteritemmodel.cpp
@@ -162,7 +162,7 @@ namespace MWGui
             const ESM::Enchantment* ench = MWBase::Environment::get().getWorld()->getStore().get<ESM::Enchantment>().search(enchId);
             if (!ench)
             {
-                std::cerr << "Can't find enchantment '" << enchId << "' on item " << base.getCellRef().getRefId() << std::endl;
+                std::cerr << "Warning: Can't find enchantment '" << enchId << "' on item " << base.getCellRef().getRefId() << std::endl;
                 return false;
             }
 
diff --git a/apps/openmw/mwgui/spellmodel.cpp b/apps/openmw/mwgui/spellmodel.cpp
index c77533008..d4ab552ff 100644
--- a/apps/openmw/mwgui/spellmodel.cpp
+++ b/apps/openmw/mwgui/spellmodel.cpp
@@ -84,7 +84,7 @@ namespace MWGui
             const ESM::Enchantment* enchant = esmStore.get<ESM::Enchantment>().search(enchantId);
             if (!enchant)
             {
-                std::cerr << "Can't find enchantment '" << enchantId << "' on item " << item.getCellRef().getRefId() << std::endl;
+                std::cerr << "Warning: Can't find enchantment '" << enchantId << "' on item " << item.getCellRef().getRefId() << std::endl;
                 continue;
             }
 
diff --git a/apps/openmw/mwgui/windowmanagerimp.cpp b/apps/openmw/mwgui/windowmanagerimp.cpp
index 4fb096a7f..654d654c7 100644
--- a/apps/openmw/mwgui/windowmanagerimp.cpp
+++ b/apps/openmw/mwgui/windowmanagerimp.cpp
@@ -1162,7 +1162,7 @@ namespace MWGui
         {
             if (!mStore)
             {
-                std::cerr << "WindowManager::onRetrieveTag: no Store set up yet, can not replace '" << tag << "'" << std::endl;
+                std::cerr << "Error: WindowManager::onRetrieveTag: no Store set up yet, can not replace '" << tag << "'" << std::endl;
                 return;
             }
             const ESM::GameSetting *setting = mStore->get<ESM::GameSetting>().find(tag);
diff --git a/apps/openmw/mwinput/inputmanagerimp.cpp b/apps/openmw/mwinput/inputmanagerimp.cpp
index 3141e42f6..8591bc94f 100644
--- a/apps/openmw/mwinput/inputmanagerimp.cpp
+++ b/apps/openmw/mwinput/inputmanagerimp.cpp
@@ -389,47 +389,49 @@ namespace MWInput
 
         updateCursorMode();
 
-        if(mJoystickLastUsed)
+        if (mGuiCursorEnabled)
         {
-            if (mGuiCursorEnabled)
+            float xAxis = mInputBinder->getChannel(A_MoveLeftRight)->getValue()*2.0f-1.0f;
+            float yAxis = mInputBinder->getChannel(A_MoveForwardBackward)->getValue()*2.0f-1.0f;
+            float zAxis = mInputBinder->getChannel(A_LookUpDown)->getValue()*2.0f-1.0f;
+            const MyGUI::IntSize& viewSize = MyGUI::RenderManager::getInstance().getViewSize();
+
+            xAxis *= (1.5f - mInputBinder->getChannel(A_Use)->getValue());
+            yAxis *= (1.5f - mInputBinder->getChannel(A_Use)->getValue());
+
+            // We keep track of our own mouse position, so that moving the mouse while in
+            // game mode does not move the position of the GUI cursor
+            float xmove = xAxis * dt * 1500.0f * mInvUiScalingFactor;
+            float ymove = yAxis * dt * 1500.0f * mInvUiScalingFactor;
+            if (xmove != 0|| ymove != 0)
             {
-                float xAxis = mInputBinder->getChannel(A_MoveLeftRight)->getValue()*2.0f-1.0f;
-                float yAxis = mInputBinder->getChannel(A_MoveForwardBackward)->getValue()*2.0f-1.0f;
-                float zAxis = mInputBinder->getChannel(A_LookUpDown)->getValue()*2.0f-1.0f;
-                const MyGUI::IntSize& viewSize = MyGUI::RenderManager::getInstance().getViewSize();
-
-                xAxis *= (1.5f - mInputBinder->getChannel(A_Use)->getValue());
-                yAxis *= (1.5f - mInputBinder->getChannel(A_Use)->getValue());
-
-                // We keep track of our own mouse position, so that moving the mouse while in
-                // game mode does not move the position of the GUI cursor
-                mGuiCursorX += xAxis * dt * 1500.0f * mInvUiScalingFactor;
-                mGuiCursorY += yAxis * dt * 1500.0f * mInvUiScalingFactor;
+                mGuiCursorX += xmove;
+                mGuiCursorY += ymove;
                 mMouseWheel -= static_cast<int>(zAxis * dt * 1500.0f);
 
-                mGuiCursorX = std::max(0.f, std::min(mGuiCursorX, float(viewSize.width)));
-                mGuiCursorY = std::max(0.f, std::min(mGuiCursorY, float(viewSize.height)));
+                mGuiCursorX = std::max(0.f, std::min(mGuiCursorX, float(viewSize.width-1)));
+                mGuiCursorY = std::max(0.f, std::min(mGuiCursorY, float(viewSize.height-1)));
 
                 MyGUI::InputManager::getInstance().injectMouseMove(static_cast<int>(mGuiCursorX), static_cast<int>(mGuiCursorY), mMouseWheel);
                 mInputManager->warpMouse(static_cast<int>(mGuiCursorX/mInvUiScalingFactor), static_cast<int>(mGuiCursorY/mInvUiScalingFactor));
             }
-            if (mMouseLookEnabled)
-            {
-                float xAxis = mInputBinder->getChannel(A_LookLeftRight)->getValue()*2.0f-1.0f;
-                float yAxis = mInputBinder->getChannel(A_LookUpDown)->getValue()*2.0f-1.0f;
-                resetIdleTime();
+        }
+        if (mMouseLookEnabled)
+        {
+            float xAxis = mInputBinder->getChannel(A_LookLeftRight)->getValue()*2.0f-1.0f;
+            float yAxis = mInputBinder->getChannel(A_LookUpDown)->getValue()*2.0f-1.0f;
+            resetIdleTime();
 
-                float rot[3];
-                rot[0] = yAxis * (dt * 100.0f) * 10.0f * mCameraSensitivity * (1.0f/256.f) * (mInvertY ? -1 : 1) * mCameraYMultiplier;
-                rot[1] = 0.0f;
-                rot[2] = xAxis * (dt * 100.0f) * 10.0f * mCameraSensitivity * (1.0f/256.f);
+            float rot[3];
+            rot[0] = yAxis * (dt * 100.0f) * 10.0f * mCameraSensitivity * (1.0f/256.f) * (mInvertY ? -1 : 1) * mCameraYMultiplier;
+            rot[1] = 0.0f;
+            rot[2] = xAxis * (dt * 100.0f) * 10.0f * mCameraSensitivity * (1.0f/256.f);
 
-                // Only actually turn player when we're not in vanity mode
-                if(!MWBase::Environment::get().getWorld()->vanityRotateCamera(rot))
-                {
-                    mPlayer->yaw(rot[2]);
-                    mPlayer->pitch(rot[0]);
-                }
+            // Only actually turn player when we're not in vanity mode
+            if(!MWBase::Environment::get().getWorld()->vanityRotateCamera(rot))
+            {
+                mPlayer->yaw(rot[2]);
+                mPlayer->pitch(rot[0]);
             }
         }
 
@@ -443,73 +445,73 @@ namespace MWInput
             {
                 bool triedToMove = false;
                 bool isRunning = false;
-                if(mJoystickLastUsed)
+
+                // joystick movement
+                float xAxis = mInputBinder->getChannel(A_MoveLeftRight)->getValue();
+                float yAxis = mInputBinder->getChannel(A_MoveForwardBackward)->getValue();
+                if (xAxis < .5)
                 {
-                    float xAxis = mInputBinder->getChannel(A_MoveLeftRight)->getValue();
-                    float yAxis = mInputBinder->getChannel(A_MoveForwardBackward)->getValue();
-                    if (xAxis < .5)
-                    {
-                        triedToMove = true;
-                        mPlayer->setLeftRight (-1);
-                    }
-                    else if (xAxis > .5)
-                    {
-                        triedToMove = true;
-                        mPlayer->setLeftRight (1);
-                    }
+                    triedToMove = true;
+                    mPlayer->setLeftRight (-1);
+                }
+                else if (xAxis > .5)
+                {
+                    triedToMove = true;
+                    mPlayer->setLeftRight (1);
+                }
 
-                    if (yAxis < .5)
-                    {
-                        triedToMove = true;
-                        mPlayer->setAutoMove (false);
-                        mPlayer->setForwardBackward (1);
-                    }
-                    else if (yAxis > .5)
-                    {
-                        triedToMove = true;
-                        mPlayer->setAutoMove (false);
-                        mPlayer->setForwardBackward (-1);
-                    }
+                if (yAxis < .5)
+                {
+                    triedToMove = true;
+                    mPlayer->setAutoMove (false);
+                    mPlayer->setForwardBackward (1);
+                }
+                else if (yAxis > .5)
+                {
+                    triedToMove = true;
+                    mPlayer->setAutoMove (false);
+                    mPlayer->setForwardBackward (-1);
+                }
+                else if(mPlayer->getAutoMove())
+                {
+                    triedToMove = true;
+                    mPlayer->setForwardBackward (1);
+                }
+                if (triedToMove)
+                    mJoystickLastUsed = true;
 
-                    else if(mPlayer->getAutoMove())
-                    {
-                        triedToMove = true;
-                        mPlayer->setForwardBackward (1);
-                    }
-                    isRunning = xAxis > .75 || xAxis < .25 || yAxis > .75 || yAxis < .25;
-                    if(triedToMove) resetIdleTime();
+                // keyboard movement
+                isRunning = xAxis > .75 || xAxis < .25 || yAxis > .75 || yAxis < .25;
+                if(triedToMove) resetIdleTime();
+
+                if (actionIsActive(A_MoveLeft))
+                {
+                    triedToMove = true;
+                    mPlayer->setLeftRight (-1);
                 }
-                else
+                else if (actionIsActive(A_MoveRight))
                 {
-                    if (actionIsActive(A_MoveLeft))
-                    {
-                        triedToMove = true;
-                        mPlayer->setLeftRight (-1);
-                    }
-                    else if (actionIsActive(A_MoveRight))
-                    {
-                        triedToMove = true;
-                        mPlayer->setLeftRight (1);
-                    }
+                    triedToMove = true;
+                    mPlayer->setLeftRight (1);
+                }
 
-                    if (actionIsActive(A_MoveForward))
-                    {
-                        triedToMove = true;
-                        mPlayer->setAutoMove (false);
-                        mPlayer->setForwardBackward (1);
-                    }
-                    else if (actionIsActive(A_MoveBackward))
-                    {
-                        triedToMove = true;
-                        mPlayer->setAutoMove (false);
-                        mPlayer->setForwardBackward (-1);
-                    }
+                if (actionIsActive(A_MoveForward))
+                {
+                    triedToMove = true;
+                    mPlayer->setAutoMove (false);
+                    mPlayer->setForwardBackward (1);
+                }
+                else if (actionIsActive(A_MoveBackward))
+                {
+                    triedToMove = true;
+                    mPlayer->setAutoMove (false);
+                    mPlayer->setForwardBackward (-1);
+                }
 
-                    else if(mPlayer->getAutoMove())
-                    {
-                        triedToMove = true;
-                        mPlayer->setForwardBackward (1);
-                    }
+                else if(mPlayer->getAutoMove())
+                {
+                    triedToMove = true;
+                    mPlayer->setForwardBackward (1);
                 }
 
                 if (!mSneakToggles)
@@ -855,7 +857,6 @@ namespace MWInput
 
     void InputManager::axisMoved(int deviceID, const SDL_ControllerAxisEvent &arg )
     {
-        mJoystickLastUsed = true;
         if (!mControlsDisabled)
             mInputBinder->axisMoved(deviceID, arg);
     }
diff --git a/apps/openmw/mwmechanics/actors.cpp b/apps/openmw/mwmechanics/actors.cpp
index b0f9b1d50..fcb6a20e2 100644
--- a/apps/openmw/mwmechanics/actors.cpp
+++ b/apps/openmw/mwmechanics/actors.cpp
@@ -1507,7 +1507,7 @@ namespace MWMechanics
         }
         else
         {
-            std::cerr<< "Error in Actors::playAnimationGroup:  Unable to find " << ptr.getCellRef().getRefId() << std::endl;
+            std::cerr<< "Warning: Actors::playAnimationGroup:  Unable to find " << ptr.getCellRef().getRefId() << std::endl;
             return false;
         }
     }
diff --git a/apps/openmw/mwmechanics/aiwander.cpp b/apps/openmw/mwmechanics/aiwander.cpp
index 73ddce4b4..5396b5b39 100644
--- a/apps/openmw/mwmechanics/aiwander.cpp
+++ b/apps/openmw/mwmechanics/aiwander.cpp
@@ -725,7 +725,7 @@ namespace MWMechanics
         }
         else
         {
-            std::cerr<< "Attempted to play out of range idle animation \""<<idleSelect<<"\" for " << actor.getCellRef().getRefId() << std::endl;
+            std::cerr<< "Error: Attempted to play out of range idle animation \""<<idleSelect<<"\" for " << actor.getCellRef().getRefId() << std::endl;
             return false;
         }
     }
diff --git a/apps/openmw/mwmechanics/objects.cpp b/apps/openmw/mwmechanics/objects.cpp
index 139825c21..7d7a5f14f 100644
--- a/apps/openmw/mwmechanics/objects.cpp
+++ b/apps/openmw/mwmechanics/objects.cpp
@@ -88,7 +88,7 @@ bool Objects::playAnimationGroup(const MWWorld::Ptr& ptr, const std::string& gro
     }
     else
     {
-        std::cerr<< "Error in Objects::playAnimationGroup:  Unable to find " << ptr.getCellRef().getRefId() << std::endl;
+        std::cerr<< "Warning: Objects::playAnimationGroup:  Unable to find " << ptr.getCellRef().getRefId() << std::endl;
         return false;
     }
 }
diff --git a/apps/openmw/mwphysics/physicssystem.cpp b/apps/openmw/mwphysics/physicssystem.cpp
index 7388d2714..9844667ae 100644
--- a/apps/openmw/mwphysics/physicssystem.cpp
+++ b/apps/openmw/mwphysics/physicssystem.cpp
@@ -652,7 +652,7 @@ namespace MWPhysics
                     mPtr.getRefData().getBaseNode()->accept(visitor);
                     if (!visitor.mFound)
                     {
-                        std::cerr << "animateCollisionShapes: Can't find node " << recIndex << " for " << mPtr.getCellRef().getRefId() << std::endl;
+                        std::cerr << "Error: animateCollisionShapes can't find node " << recIndex << " for " << mPtr.getCellRef().getRefId() << std::endl;
                         return;
                     }
                     osg::NodePath nodePath = visitor.mFoundPath;
diff --git a/apps/openmw/mwrender/animation.cpp b/apps/openmw/mwrender/animation.cpp
index 5300d6ab4..ba4307c89 100644
--- a/apps/openmw/mwrender/animation.cpp
+++ b/apps/openmw/mwrender/animation.cpp
@@ -562,7 +562,7 @@ namespace MWRender
             NodeMap::const_iterator found = nodeMap.find(bonename);
             if (found == nodeMap.end())
             {
-                std::cerr << "addAnimSource: can't find bone '" + bonename << "' in " << model << " (referenced by " << kfname << ")" << std::endl;
+                std::cerr << "Warning: addAnimSource: can't find bone '" + bonename << "' in " << model << " (referenced by " << kfname << ")" << std::endl;
                 continue;
             }
 
@@ -1697,12 +1697,12 @@ namespace MWRender
     PartHolder::~PartHolder()
     {
         if (mNode.get() && !mNode->getNumParents())
-            std::cerr << "Warning: part has no parents " << std::endl;
+            std::cerr << "Error: part has no parents " << std::endl;
 
         if (mNode.get() && mNode->getNumParents())
         {
             if (mNode->getNumParents() > 1)
-                std::cerr << "Warning: part has multiple parents " << mNode->getNumParents() << " " << mNode.get() << std::endl;
+                std::cerr << "Error: part has multiple parents " << mNode->getNumParents() << " " << mNode.get() << std::endl;
             mNode->getParent(0)->removeChild(mNode);
         }
     }
diff --git a/apps/openmw/mwrender/creatureanimation.cpp b/apps/openmw/mwrender/creatureanimation.cpp
index b105746c6..cb6489ef4 100644
--- a/apps/openmw/mwrender/creatureanimation.cpp
+++ b/apps/openmw/mwrender/creatureanimation.cpp
@@ -155,7 +155,7 @@ void CreatureWeaponAnimation::updatePart(PartHolderPtr& scene, int slot)
     }
     catch (std::exception& e)
     {
-        std::cerr << "Error adding creature part: " << e.what() << std::endl;
+        std::cerr << "Can not add creature part: " << e.what() << std::endl;
     }
 }
 
diff --git a/apps/openmw/mwrender/globalmap.cpp b/apps/openmw/mwrender/globalmap.cpp
index 0d8a7a039..2536818ef 100644
--- a/apps/openmw/mwrender/globalmap.cpp
+++ b/apps/openmw/mwrender/globalmap.cpp
@@ -408,14 +408,14 @@ namespace MWRender
         osgDB::ReaderWriter* readerwriter = osgDB::Registry::instance()->getReaderWriterForExtension("png");
         if (!readerwriter)
         {
-            std::cerr << "Can't write map overlay: no png readerwriter found" << std::endl;
+            std::cerr << "Error: Can't write map overlay: no png readerwriter found" << std::endl;
             return;
         }
 
         osgDB::ReaderWriter::WriteResult result = readerwriter->writeImage(*mOverlayImage, ostream);
         if (!result.success())
         {
-            std::cerr << "Can't write map overlay: " << result.message() << " code " << result.status() << std::endl;
+            std::cerr << "Error: Can't write map overlay: " << result.message() << " code " << result.status() << std::endl;
             return;
         }
 
@@ -460,14 +460,14 @@ namespace MWRender
         osgDB::ReaderWriter* readerwriter = osgDB::Registry::instance()->getReaderWriterForExtension("png");
         if (!readerwriter)
         {
-            std::cerr << "Can't read map overlay: no png readerwriter found" << std::endl;
+            std::cerr << "Error: Can't read map overlay: no png readerwriter found" << std::endl;
             return;
         }
 
         osgDB::ReaderWriter::ReadResult result = readerwriter->readImage(istream);
         if (!result.success())
         {
-            std::cerr << "Can't read map overlay: " << result.message() << " code " << result.status() << std::endl;
+            std::cerr << "Error: Can't read map overlay: " << result.message() << " code " << result.status() << std::endl;
             return;
         }
 
@@ -569,7 +569,7 @@ namespace MWRender
         CameraVector::iterator found = std::find(mActiveCameras.begin(), mActiveCameras.end(), camera);
         if (found == mActiveCameras.end())
         {
-            std::cerr << "GlobalMap trying to remove an inactive camera" << std::endl;
+            std::cerr << "Error: GlobalMap trying to remove an inactive camera" << std::endl;
             return;
         }
         mActiveCameras.erase(found);
diff --git a/apps/openmw/mwrender/localmap.cpp b/apps/openmw/mwrender/localmap.cpp
index 240ddc2e5..0e854d5dc 100644
--- a/apps/openmw/mwrender/localmap.cpp
+++ b/apps/openmw/mwrender/localmap.cpp
@@ -320,7 +320,7 @@ void LocalMap::markForRemoval(osg::Camera *cam)
     CameraVector::iterator found = std::find(mActiveCameras.begin(), mActiveCameras.end(), cam);
     if (found == mActiveCameras.end())
     {
-        std::cerr << "trying to remove an inactive camera" << std::endl;
+        std::cerr << "Error: trying to remove an inactive camera" << std::endl;
         return;
     }
     mActiveCameras.erase(found);
@@ -487,7 +487,7 @@ void LocalMap::requestInteriorMap(const MWWorld::CellStore* cell)
                     // We are using the same bounds and angle as we were using when the textures were originally made. Segments should come out the same.
                     if (i >= int(fog->mFogTextures.size()))
                     {
-                        std::cout << "Warning: fog texture count mismatch" << std::endl;
+                        std::cout << "Error: fog texture count mismatch" << std::endl;
                         break;
                     }
 
@@ -679,7 +679,7 @@ void LocalMap::MapSegment::loadFogOfWar(const ESM::FogTexture &esm)
     osgDB::ReaderWriter* readerwriter = osgDB::Registry::instance()->getReaderWriterForExtension("tga");
     if (!readerwriter)
     {
-        std::cerr << "Unable to load fog, can't find a tga ReaderWriter" << std::endl;
+        std::cerr << "Error: Unable to load fog, can't find a tga ReaderWriter" << std::endl;
         return;
     }
 
@@ -688,7 +688,7 @@ void LocalMap::MapSegment::loadFogOfWar(const ESM::FogTexture &esm)
     osgDB::ReaderWriter::ReadResult result = readerwriter->readImage(in);
     if (!result.success())
     {
-        std::cerr << "Failed to read fog: " << result.message() << " code " << result.status() << std::endl;
+        std::cerr << "Error: Failed to read fog: " << result.message() << " code " << result.status() << std::endl;
         return;
     }
 
@@ -711,7 +711,7 @@ void LocalMap::MapSegment::saveFogOfWar(ESM::FogTexture &fog) const
     osgDB::ReaderWriter* readerwriter = osgDB::Registry::instance()->getReaderWriterForExtension("tga");
     if (!readerwriter)
     {
-        std::cerr << "Unable to write fog, can't find a tga ReaderWriter" << std::endl;
+        std::cerr << "Error: Unable to write fog, can't find a tga ReaderWriter" << std::endl;
         return;
     }
 
@@ -720,7 +720,7 @@ void LocalMap::MapSegment::saveFogOfWar(ESM::FogTexture &fog) const
     osgDB::ReaderWriter::WriteResult result = readerwriter->writeImage(*mFogOfWarImage, ostream);
     if (!result.success())
     {
-        std::cerr << "Unable to write fog: " << result.message() << " code " << result.status() << std::endl;
+        std::cerr << "Error: Unable to write fog: " << result.message() << " code " << result.status() << std::endl;
         return;
     }
     mFogOfWarImage->flipVertical();
diff --git a/apps/openmw/mwrender/npcanimation.cpp b/apps/openmw/mwrender/npcanimation.cpp
index 1219f8920..87b6ae2bc 100644
--- a/apps/openmw/mwrender/npcanimation.cpp
+++ b/apps/openmw/mwrender/npcanimation.cpp
@@ -435,7 +435,7 @@ void NpcAnimation::updateNpcBase()
             if (bp)
                 mHeadModel = "meshes\\" + bp->mModel;
             else
-                std::cerr << "Failed to load body part '" << mNpc->mHead << "'" << std::endl;
+                std::cerr << "Warning: Failed to load body part '" << mNpc->mHead << "'" << std::endl;
         }
 
         mHairModel = "";
@@ -445,7 +445,7 @@ void NpcAnimation::updateNpcBase()
             if (bp)
                 mHairModel = "meshes\\" + bp->mModel;
             else
-                std::cerr << "Failed to load body part '" << mNpc->mHair << "'" << std::endl;
+                std::cerr << "Warning: Failed to load body part '" << mNpc->mHair << "'" << std::endl;
         }
     }
 
@@ -625,7 +625,8 @@ void NpcAnimation::updateParts()
             const ESM::Light *light = part.get<ESM::Light>()->mBase;
             addOrReplaceIndividualPart(ESM::PRT_Shield, MWWorld::InventoryStore::Slot_CarriedLeft,
                                        1, "meshes\\"+light->mModel);
-            addExtraLight(mObjectParts[ESM::PRT_Shield]->getNode()->asGroup(), light);
+            if (mObjectParts[ESM::PRT_Shield])
+                addExtraLight(mObjectParts[ESM::PRT_Shield]->getNode()->asGroup(), light);
         }
     }
 
@@ -828,7 +829,7 @@ void NpcAnimation::addPartGroup(int group, int priority, const std::vector<ESM::
                     bodypart = NULL;
             }
             else if (!bodypart)
-                std::cerr << "Failed to find body part '" << part->mFemale << "'" << std::endl;
+                std::cerr << "Warning: Failed to find body part '" << part->mFemale << "'" << std::endl;
         }
         if(!bodypart && !part->mMale.empty())
         {
@@ -843,7 +844,7 @@ void NpcAnimation::addPartGroup(int group, int priority, const std::vector<ESM::
                     bodypart = NULL;
             }
             else if (!bodypart)
-                std::cerr << "Failed to find body part '" << part->mMale << "'" << std::endl;
+                std::cerr << "Warning: Failed to find body part '" << part->mMale << "'" << std::endl;
         }
 
         if(bodypart)
@@ -920,7 +921,7 @@ void NpcAnimation::showCarriedLeft(bool show)
         if (addOrReplaceIndividualPart(ESM::PRT_Shield, MWWorld::InventoryStore::Slot_CarriedLeft, 1,
                                    mesh, !iter->getClass().getEnchantment(*iter).empty(), &glowColor))
         {
-            if (iter->getTypeName() == typeid(ESM::Light).name())
+            if (iter->getTypeName() == typeid(ESM::Light).name() && mObjectParts[ESM::PRT_Shield])
                 addExtraLight(mObjectParts[ESM::PRT_Shield]->getNode()->asGroup(), iter->get<ESM::Light>()->mBase);
         }
     }
diff --git a/apps/openmw/mwrender/water.cpp b/apps/openmw/mwrender/water.cpp
index 2e10d42e5..d2ad1f9b5 100644
--- a/apps/openmw/mwrender/water.cpp
+++ b/apps/openmw/mwrender/water.cpp
@@ -197,16 +197,16 @@ osg::ref_ptr<osg::Image> readPngImage (const std::string& file)
     boost::filesystem::ifstream inStream;
     inStream.open(file, std::ios_base::in | std::ios_base::binary);
     if (inStream.fail())
-        std::cerr << "Failed to open " << file << std::endl;
+        std::cerr << "Error: Failed to open " << file << std::endl;
     osgDB::ReaderWriter* reader = osgDB::Registry::instance()->getReaderWriterForExtension("png");
     if (!reader)
     {
-        std::cerr << "Failed to read " << file << ", no png readerwriter found" << std::endl;
+        std::cerr << "Error: Failed to read " << file << ", no png readerwriter found" << std::endl;
         return osg::ref_ptr<osg::Image>();
     }
     osgDB::ReaderWriter::ReadResult result = reader->readImage(inStream);
     if (!result.success())
-        std::cerr << "Failed to read " << file << ": " << result.message() << " code " << result.status() << std::endl;
+        std::cerr << "Error: Failed to read " << file << ": " << result.message() << " code " << result.status() << std::endl;
 
     return result.getImage();
 }
diff --git a/apps/openmw/mwscript/scriptmanagerimp.cpp b/apps/openmw/mwscript/scriptmanagerimp.cpp
index 97ea19a63..7c1f9bf4d 100644
--- a/apps/openmw/mwscript/scriptmanagerimp.cpp
+++ b/apps/openmw/mwscript/scriptmanagerimp.cpp
@@ -65,14 +65,14 @@ namespace MWScript
             }
             catch (const std::exception& error)
             {
-                std::cerr << "An exception has been thrown: " << error.what() << std::endl;
+                std::cerr << "Error: An exception has been thrown: " << error.what() << std::endl;
                 Success = false;
             }
 
             if (!Success)
             {
                 std::cerr
-                    << "compiling failed: " << name << std::endl;
+                    << "Warning: compiling failed: " << name << std::endl;
             }
 
             if (Success)
diff --git a/apps/openmw/mwscript/statsextensions.cpp b/apps/openmw/mwscript/statsextensions.cpp
index 59b6d5829..7b9fecc93 100644
--- a/apps/openmw/mwscript/statsextensions.cpp
+++ b/apps/openmw/mwscript/statsextensions.cpp
@@ -238,7 +238,7 @@ namespace MWScript
                         if (R()(runtime, false, true).isEmpty())
                         {
                             std::cerr
-                                << "Compensating for broken script in Morrowind.esm by "
+                                << "Warning: Compensating for broken script in Morrowind.esm by "
                                 << "ignoring remote access to dagoth_ur_1" << std::endl;
                             return;
                         }
diff --git a/apps/openmw/mwscript/transformationextensions.cpp b/apps/openmw/mwscript/transformationextensions.cpp
index 1fcf070d8..477657b8d 100644
--- a/apps/openmw/mwscript/transformationextensions.cpp
+++ b/apps/openmw/mwscript/transformationextensions.cpp
@@ -332,7 +332,7 @@ namespace MWScript
                         store = MWBase::Environment::get().getWorld()->getExterior(cx,cy);
                         if(!cell)
                         {
-                            std::string error = "PositionCell: unknown interior cell (" + cellID + "), moving to exterior instead";
+                            std::string error = "Warning: PositionCell: unknown interior cell (" + cellID + "), moving to exterior instead";
                             runtime.getContext().report (error);
                             std::cerr << error << std::endl;
                         }
diff --git a/apps/openmw/mwstate/statemanagerimp.cpp b/apps/openmw/mwstate/statemanagerimp.cpp
index 58d85fe5b..64c543fb1 100644
--- a/apps/openmw/mwstate/statemanagerimp.cpp
+++ b/apps/openmw/mwstate/statemanagerimp.cpp
@@ -471,7 +471,7 @@ void MWState::StateManager::loadGame (const Character *character, const std::str
                 default:
 
                     // ignore invalid records
-                    std::cerr << "Ignoring unknown record: " << n.toString() << std::endl;
+                    std::cerr << "Warning: Ignoring unknown record: " << n.toString() << std::endl;
                     reader.skipRecord();
             }
             int progressPercent = static_cast<int>(float(reader.getFileOffset())/total*100);
@@ -613,7 +613,7 @@ bool MWState::StateManager::verifyProfile(const ESM::SavedGame& profile) const
         if (std::find(selectedContentFiles.begin(), selectedContentFiles.end(), *it)
                 == selectedContentFiles.end())
         {
-            std::cerr << "Savegame dependency " << *it << " is missing." << std::endl;
+            std::cerr << "Warning: Savegame dependency " << *it << " is missing." << std::endl;
             notFound = true;
         }
     }
@@ -641,7 +641,7 @@ void MWState::StateManager::writeScreenshot(std::vector<char> &imageData) const
     osgDB::ReaderWriter* readerwriter = osgDB::Registry::instance()->getReaderWriterForExtension("jpg");
     if (!readerwriter)
     {
-        std::cerr << "Unable to write screenshot, can't find a jpg ReaderWriter" << std::endl;
+        std::cerr << "Error: Unable to write screenshot, can't find a jpg ReaderWriter" << std::endl;
         return;
     }
 
@@ -649,7 +649,7 @@ void MWState::StateManager::writeScreenshot(std::vector<char> &imageData) const
     osgDB::ReaderWriter::WriteResult result = readerwriter->writeImage(*screenshot, ostream);
     if (!result.success())
     {
-        std::cerr << "Unable to write screenshot: " << result.message() << " code " << result.status() << std::endl;
+        std::cerr << "Error: Unable to write screenshot: " << result.message() << " code " << result.status() << std::endl;
         return;
     }
 
diff --git a/apps/openmw/mwworld/cellpreloader.cpp b/apps/openmw/mwworld/cellpreloader.cpp
index 7b90da43b..278efa53d 100644
--- a/apps/openmw/mwworld/cellpreloader.cpp
+++ b/apps/openmw/mwworld/cellpreloader.cpp
@@ -209,12 +209,12 @@ namespace MWWorld
     {
         if (!mWorkQueue)
         {
-            std::cerr << "can't preload, no work queue set " << std::endl;
+            std::cerr << "Error: can't preload, no work queue set " << std::endl;
             return;
         }
         if (cell->getState() == CellStore::State_Unloaded)
         {
-            std::cerr << "can't preload objects for unloaded cell" << std::endl;
+            std::cerr << "Error: can't preload objects for unloaded cell" << std::endl;
             return;
         }
 
diff --git a/apps/openmw/mwworld/cells.cpp b/apps/openmw/mwworld/cells.cpp
index 384d7e124..6cd495ee6 100644
--- a/apps/openmw/mwworld/cells.cpp
+++ b/apps/openmw/mwworld/cells.cpp
@@ -349,7 +349,7 @@ bool MWWorld::Cells::readRecord (ESM::ESMReader& reader, uint32_t type,
         catch (...)
         {
             // silently drop cells that don't exist anymore
-            std::cerr << "Dropping state for cell " << state.mId.mWorldspace << " (cell no longer exists)" << std::endl;
+            std::cerr << "Warning: Dropping state for cell " << state.mId.mWorldspace << " (cell no longer exists)" << std::endl;
             reader.skipRecord();
             return true;
         }
diff --git a/apps/openmw/mwworld/cellstore.cpp b/apps/openmw/mwworld/cellstore.cpp
index 59fa1f5e2..52af21954 100644
--- a/apps/openmw/mwworld/cellstore.cpp
+++ b/apps/openmw/mwworld/cellstore.cpp
@@ -140,7 +140,7 @@ namespace
                     return;
                 }
 
-            std::cerr << "Dropping reference to " << state.mRef.mRefID << " (invalid content file link)" << std::endl;
+            std::cerr << "Warning: Dropping reference to " << state.mRef.mRefID << " (invalid content file link)" << std::endl;
             return;
         }
 
@@ -199,7 +199,7 @@ namespace MWWorld
         else
         {
             std::cerr
-                << "Error: could not resolve cell reference '" << ref.mRefID << "'"
+                << "Warning: could not resolve cell reference '" << ref.mRefID << "'"
                 << " (dropping reference)" << std::endl;
         }
     }
@@ -750,7 +750,7 @@ namespace MWWorld
 
             default:
                 std::cerr
-                    << "WARNING: Ignoring reference '" << ref.mRefID << "' of unhandled type\n";
+                    << "Error: Ignoring reference '" << ref.mRefID << "' of unhandled type\n";
                 return;
         }
 
@@ -981,7 +981,7 @@ namespace MWWorld
 
             if (!visitor.mFound)
             {
-                std::cerr << "Dropping moved ref tag for " << refnum.mIndex << " (moved object no longer exists)" << std::endl;
+                std::cerr << "Warning: Dropping moved ref tag for " << refnum.mIndex << " (moved object no longer exists)" << std::endl;
                 continue;
             }
 
@@ -991,7 +991,7 @@ namespace MWWorld
 
             if (otherCell == NULL)
             {
-                std::cerr << "Dropping moved ref tag for " << movedRef->mRef.getRefId()
+                std::cerr << "Warning: Dropping moved ref tag for " << movedRef->mRef.getRefId()
                           << " (target cell " << movedTo.mWorldspace << " no longer exists). Reference moved back to its original location." << std::endl;
                 // Note by dropping tag the object will automatically re-appear in its original cell, though potentially at inapproriate coordinates.
                 // Restore original coordinates:
diff --git a/apps/openmw/mwworld/containerstore.cpp b/apps/openmw/mwworld/containerstore.cpp
index a5090a66a..d9fddf7a9 100644
--- a/apps/openmw/mwworld/containerstore.cpp
+++ b/apps/openmw/mwworld/containerstore.cpp
@@ -496,7 +496,7 @@ void MWWorld::ContainerStore::addInitialItem (const std::string& id, const std::
     }
     catch (const std::exception& e)
     {
-        std::cerr << "Error in MWWorld::ContainerStore::addInitialItem: " << e.what() << std::endl;
+        std::cerr << "Warning: MWWorld::ContainerStore::addInitialItem: " << e.what() << std::endl;
     }
 
 }
@@ -796,10 +796,10 @@ void MWWorld::ContainerStore::readState (const ESM::InventoryState& inventory)
             case ESM::REC_WEAP: readEquipmentState (getState (weapons, state), thisIndex, inventory); break;
             case ESM::REC_LIGH: readEquipmentState (getState (lights, state), thisIndex, inventory); break;
             case 0:
-                std::cerr << "Dropping reference to '" << state.mRef.mRefID << "' (object no longer exists)" << std::endl;
+                std::cerr << "Warning: Dropping reference to '" << state.mRef.mRefID << "' (object no longer exists)" << std::endl;
                 break;
             default:
-                std::cerr << "Invalid item type in inventory state, refid " << state.mRef.mRefID << std::endl;
+                std::cerr << "Warning: Invalid item type in inventory state, refid " << state.mRef.mRefID << std::endl;
                 break;
         }
     }
diff --git a/apps/openmw/mwworld/inventorystore.cpp b/apps/openmw/mwworld/inventorystore.cpp
index ccde37d60..a0d550f7f 100644
--- a/apps/openmw/mwworld/inventorystore.cpp
+++ b/apps/openmw/mwworld/inventorystore.cpp
@@ -857,7 +857,7 @@ void MWWorld::InventoryStore::updateRechargingItems()
                         enchantmentId);
             if (!enchantment)
             {
-                std::cerr << "Can't find enchantment '" << enchantmentId << "' on item " << it->getCellRef().getRefId() << std::endl;
+                std::cerr << "Warning: Can't find enchantment '" << enchantmentId << "' on item " << it->getCellRef().getRefId() << std::endl;
                 continue;
             }
 
diff --git a/apps/openmw/mwworld/livecellref.cpp b/apps/openmw/mwworld/livecellref.cpp
index 6d138d7e1..66d1c8d70 100644
--- a/apps/openmw/mwworld/livecellref.cpp
+++ b/apps/openmw/mwworld/livecellref.cpp
@@ -40,7 +40,7 @@ void MWWorld::LiveCellRefBase::loadImp (const ESM::ObjectState& state)
                 catch (const std::exception& exception)
                 {
                     std::cerr
-                        << "failed to load state for local script " << scriptId
+                        << "Error: failed to load state for local script " << scriptId
                         << " because an exception has been thrown: " << exception.what()
                         << std::endl;
                 }
diff --git a/apps/openmw/mwworld/localscripts.cpp b/apps/openmw/mwworld/localscripts.cpp
index 5f6d10b31..4ed83bf11 100644
--- a/apps/openmw/mwworld/localscripts.cpp
+++ b/apps/openmw/mwworld/localscripts.cpp
@@ -93,7 +93,7 @@ void MWWorld::LocalScripts::add (const std::string& scriptName, const Ptr& ptr)
             for (std::list<std::pair<std::string, Ptr> >::iterator iter = mScripts.begin(); iter!=mScripts.end(); ++iter)
                 if (iter->second==ptr)
                 {
-                    std::cerr << "warning, tried to add local script twice for " << ptr.getCellRef().getRefId() << std::endl;
+                    std::cerr << "Error: tried to add local script twice for " << ptr.getCellRef().getRefId() << std::endl;
                     remove(ptr);
                     break;
                 }
diff --git a/apps/openmw/mwworld/player.cpp b/apps/openmw/mwworld/player.cpp
index a44d79157..fe13a4d60 100644
--- a/apps/openmw/mwworld/player.cpp
+++ b/apps/openmw/mwworld/player.cpp
@@ -330,7 +330,7 @@ namespace MWWorld
 
             if (!player.mObject.mEnabled)
             {
-                std::cerr << "Savegame attempted to disable the player." << std::endl;
+                std::cerr << "Warning: Savegame attempted to disable the player." << std::endl;
                 player.mObject.mEnabled = true;
             }
 
@@ -357,7 +357,7 @@ namespace MWWorld
             }
             catch (...)
             {
-                std::cerr << "Player cell '" << player.mCellId.mWorldspace << "' no longer exists" << std::endl;
+                std::cerr << "Warning: Player cell '" << player.mCellId.mWorldspace << "' no longer exists" << std::endl;
                 // Cell no longer exists. The loader will have to choose a default cell.
                 mCellStore = NULL;
             }
diff --git a/apps/openmw/mwworld/scene.cpp b/apps/openmw/mwworld/scene.cpp
index 2c7a86379..b8a362c40 100644
--- a/apps/openmw/mwworld/scene.cpp
+++ b/apps/openmw/mwworld/scene.cpp
@@ -152,7 +152,7 @@ namespace
                 }
                 catch (const std::exception& e)
                 {
-                    std::string error ("error during rendering '" + ptr.getCellRef().getRefId() + "': ");
+                    std::string error ("failed to render '" + ptr.getCellRef().getRefId() + "': ");
                     std::cerr << error + e.what() << std::endl;
                 }
             }
@@ -682,7 +682,7 @@ namespace MWWorld
         }
         catch (std::exception& e)
         {
-            std::cerr << "error during rendering '" << ptr.getCellRef().getRefId() << "': " << e.what() << std::endl;
+            std::cerr << "failed to render '" << ptr.getCellRef().getRefId() << "': " << e.what() << std::endl;
         }
     }
 
diff --git a/apps/openmw/mwworld/store.cpp b/apps/openmw/mwworld/store.cpp
index cdf66f570..704dbf970 100644
--- a/apps/openmw/mwworld/store.cpp
+++ b/apps/openmw/mwworld/store.cpp
@@ -687,7 +687,7 @@ namespace MWWorld
                             if (it_lease != wipecell->mLeasedRefs.end())
                                 wipecell->mLeasedRefs.erase(it_lease);
                             else
-                                std::cerr << "can't find " << it->mRefNum.mIndex << " " << it->mRefNum.mContentFile  << " in leasedRefs " << std::endl;
+                                std::cerr << "Error: can't find " << it->mRefNum.mIndex << " " << it->mRefNum.mContentFile  << " in leasedRefs " << std::endl;
                         }
                         *itold = *it;
                     }
diff --git a/components/esm/loaddial.cpp b/components/esm/loaddial.cpp
index f06b42250..9ef3d3964 100644
--- a/components/esm/loaddial.cpp
+++ b/components/esm/loaddial.cpp
@@ -128,7 +128,7 @@ namespace ESM
             return;
         }
 
-        std::cerr << "Failed to insert info " << info.mId << std::endl;
+        std::cerr << "Warning: Failed to insert info " << info.mId << std::endl;
     }
 
     void Dialogue::clearDeletedInfos()
diff --git a/components/esmterrain/storage.cpp b/components/esmterrain/storage.cpp
index 70ad0a50b..d1ccbeab5 100644
--- a/components/esmterrain/storage.cpp
+++ b/components/esmterrain/storage.cpp
@@ -319,7 +319,7 @@ namespace ESMTerrain
         const ESM::LandTexture* ltex = getLandTexture(id.first-1, id.second);
         if (!ltex)
         {
-            std::cerr << "Unable to find land texture index " << id.first-1 << " in plugin " << id.second << ", using default texture instead" << std::endl;
+            std::cerr << "Warning: Unable to find land texture index " << id.first-1 << " in plugin " << id.second << ", using default texture instead" << std::endl;
             return defaultTexture;
         }
 
diff --git a/components/interpreter/defines.cpp b/components/interpreter/defines.cpp
index 912a5e1d9..515c6c7d5 100644
--- a/components/interpreter/defines.cpp
+++ b/components/interpreter/defines.cpp
@@ -191,7 +191,7 @@ namespace Interpreter{
                 }
                 catch (std::exception& e)
                 {
-                    std::cerr << "Failed to replace escape character, with the following error: " << e.what() << std::endl;
+                    std::cerr << "Error: Failed to replace escape character, with the following error: " << e.what() << std::endl;
                     std::cerr << "Full text below: " << std::endl << text << std::endl;
                 }
 
diff --git a/components/nifosg/nifloader.cpp b/components/nifosg/nifloader.cpp
index cade74147..ff986c1f8 100644
--- a/components/nifosg/nifloader.cpp
+++ b/components/nifosg/nifloader.cpp
@@ -1364,7 +1364,7 @@ namespace NifOsg
                 size_t mipSize = mip.height * mip.width * pixelData->bpp / 8;
                 if (mipSize + mip.dataOffset > pixelData->data.size())
                 {
-                    std::cerr << "Internal texture's mipmap data out of bounds" << std::endl;
+                    std::cerr << "Warning: Internal texture's mipmap data out of bounds, ignoring texture" << std::endl;
                     return NULL;
                 }
 
@@ -1379,7 +1379,7 @@ namespace NifOsg
 
             if (width <= 0 || height <= 0)
             {
-                std::cerr << "Width and height must be non zero " << std::endl;
+                std::cerr << "Warning: Internal Texture Width and height must be non zero, ignoring texture" << std::endl;
                 return NULL;
             }
 
@@ -1421,7 +1421,7 @@ namespace NifOsg
                         {
                             // Not used by the vanilla engine. MCP (Morrowind Code Patch) adds an option to use Gloss maps:
                             // "- Gloss map fix. Morrowind removed gloss map entries from model files after loading them. This stops Morrowind from removing them."
-                            std::cerr << "NiTexturingProperty::GlossTexture in " << mFilename << " not currently used." << std::endl;
+                            //std::cerr << "NiTexturingProperty::GlossTexture in " << mFilename << " not currently used." << std::endl;
                             continue;
                         }
                         default:
diff --git a/components/nifosg/particle.cpp b/components/nifosg/particle.cpp
index fa0fe0be3..62360b9d6 100644
--- a/components/nifosg/particle.cpp
+++ b/components/nifosg/particle.cpp
@@ -284,7 +284,7 @@ void Emitter::emitParticles(double dt)
 
         if (!visitor.mFound)
         {
-            std::cerr << "Emitter: Can't find emitter node" << randomRecIndex << std::endl;
+            std::cerr << "Error: Can't find emitter node" << randomRecIndex << std::endl;
             return;
         }
 
diff --git a/components/resource/scenemanager.cpp b/components/resource/scenemanager.cpp
index d050d5448..698060597 100644
--- a/components/resource/scenemanager.cpp
+++ b/components/resource/scenemanager.cpp
@@ -1,6 +1,8 @@
 #include "scenemanager.hpp"
 
 #include <iostream>
+#include <cstdlib>
+
 #include <osg/Node>
 #include <osg/UserDataContainer>
 
@@ -434,6 +436,29 @@ namespace Resource
         return true;
     }
 
+    unsigned int getOptimizationOptions()
+    {
+        using namespace SceneUtil;
+        const char* env = getenv("OPENMW_OPTIMIZE");
+        unsigned int options = Optimizer::FLATTEN_STATIC_TRANSFORMS|Optimizer::REMOVE_REDUNDANT_NODES|Optimizer::MERGE_GEOMETRY;
+        if (env)
+        {
+            std::string str(env);
+
+            if(str.find("OFF")!=std::string::npos) options = 0;
+
+            if(str.find("~FLATTEN_STATIC_TRANSFORMS")!=std::string::npos) options ^= Optimizer::FLATTEN_STATIC_TRANSFORMS;
+            else if(str.find("FLATTEN_STATIC_TRANSFORMS")!=std::string::npos) options |= Optimizer::FLATTEN_STATIC_TRANSFORMS;
+
+            if(str.find("~REMOVE_REDUNDANT_NODES")!=std::string::npos) options ^= Optimizer::REMOVE_REDUNDANT_NODES;
+            else if(str.find("REMOVE_REDUNDANT_NODES")!=std::string::npos) options |= Optimizer::REMOVE_REDUNDANT_NODES;
+
+            if(str.find("~MERGE_GEOMETRY")!=std::string::npos) options ^= Optimizer::MERGE_GEOMETRY;
+            else if(str.find("MERGE_GEOMETRY")!=std::string::npos) options |= Optimizer::MERGE_GEOMETRY;
+        }
+        return options;
+    }
+
     osg::ref_ptr<const osg::Node> SceneManager::getTemplate(const std::string &name)
     {
         std::string normalized = name;
@@ -500,7 +525,9 @@ namespace Resource
                 SceneUtil::Optimizer optimizer;
                 optimizer.setIsOperationPermissibleForObjectCallback(new CanOptimizeCallback);
 
-                optimizer.optimize(loaded, SceneUtil::Optimizer::FLATTEN_STATIC_TRANSFORMS|SceneUtil::Optimizer::REMOVE_REDUNDANT_NODES|SceneUtil::Optimizer::MERGE_GEOMETRY);
+                static const unsigned int options = getOptimizationOptions();
+
+                optimizer.optimize(loaded, options);
             }
 
             if (mIncrementalCompileOperation)
@@ -613,12 +640,12 @@ namespace Resource
         if(magfilter == "nearest")
             mag = osg::Texture::NEAREST;
         else if(magfilter != "linear")
-            std::cerr<< "Invalid texture mag filter: "<<magfilter <<std::endl;
+            std::cerr<< "Warning: Invalid texture mag filter: "<<magfilter <<std::endl;
 
         if(minfilter == "nearest")
             min = osg::Texture::NEAREST;
         else if(minfilter != "linear")
-            std::cerr<< "Invalid texture min filter: "<<minfilter <<std::endl;
+            std::cerr<< "Warning: Invalid texture min filter: "<<minfilter <<std::endl;
 
         if(mipmap == "nearest")
         {
@@ -630,7 +657,7 @@ namespace Resource
         else if(mipmap != "none")
         {
             if(mipmap != "linear")
-                std::cerr<< "Invalid texture mipmap: "<<mipmap <<std::endl;
+                std::cerr<< "Warning: Invalid texture mipmap: "<<mipmap <<std::endl;
             if(min == osg::Texture::NEAREST)
                 min = osg::Texture::NEAREST_MIPMAP_LINEAR;
             else if(min == osg::Texture::LINEAR)
diff --git a/components/sceneutil/attach.cpp b/components/sceneutil/attach.cpp
index 79defe196..d4f324ced 100644
--- a/components/sceneutil/attach.cpp
+++ b/components/sceneutil/attach.cpp
@@ -63,7 +63,7 @@ namespace SceneUtil
             {
                 osg::ref_ptr<osg::Node> node = *it;
                 if (node->getNumParents() > 1)
-                    std::cerr << "CopyRigVisitor warning: node has multiple parents" << std::endl;
+                    std::cerr << "Error CopyRigVisitor: node has multiple parents" << std::endl;
                 while (node->getNumParents())
                     node->getParent(0)->removeChild(node);
 
diff --git a/components/sceneutil/optimizer.cpp b/components/sceneutil/optimizer.cpp
index 99f7ae122..b5cee6966 100644
--- a/components/sceneutil/optimizer.cpp
+++ b/components/sceneutil/optimizer.cpp
@@ -281,11 +281,11 @@ class CollectLowestTransformsVisitor : public BaseOptimizerVisitor
 
             ObjectStruct():_canBeApplied(true),_moreThanOneMatrixRequired(false) {}
 
-            void add(osg::Transform* transform)
+            void add(osg::Transform* transform, bool canOptimize)
             {
                 if (transform)
                 {
-                    if (transform->getDataVariance()!=osg::Transform::STATIC) _moreThanOneMatrixRequired=true;
+                    if (!canOptimize) _moreThanOneMatrixRequired=true;
                     else if (transform->getReferenceFrame()!=osg::Transform::RELATIVE_RF) _moreThanOneMatrixRequired=true;
                     else
                     {
@@ -322,7 +322,7 @@ class CollectLowestTransformsVisitor : public BaseOptimizerVisitor
                 itr!=_currentObjectList.end();
                 ++itr)
             {
-                _objectMap[*itr].add(transform);
+                _objectMap[*itr].add(transform, transform && isOperationPermissibleForObject(transform));
             }
         }
 
@@ -802,8 +802,7 @@ bool Optimizer::RemoveRedundantNodesVisitor::isOperationPermissible(osg::Node& n
 
 void Optimizer::RemoveRedundantNodesVisitor::apply(osg::Group& group)
 {
-    if (group.getNumChildren()==1 &&
-        typeid(group)==typeid(osg::Group) &&
+    if (typeid(group)==typeid(osg::Group) &&
         isOperationPermissible(group))
     {
         _redundantNodeList.insert(&group);
diff --git a/components/sceneutil/riggeometry.cpp b/components/sceneutil/riggeometry.cpp
index ba779df3e..9adfdcddb 100644
--- a/components/sceneutil/riggeometry.cpp
+++ b/components/sceneutil/riggeometry.cpp
@@ -162,13 +162,13 @@ bool RigGeometry::initFromParentSkeleton(osg::NodeVisitor* nv)
 
     if (!mSkeleton)
     {
-        std::cerr << "A RigGeometry did not find its parent skeleton" << std::endl;
+        std::cerr << "Error: A RigGeometry did not find its parent skeleton" << std::endl;
         return false;
     }
 
     if (!mInfluenceMap)
     {
-        std::cerr << "No InfluenceMap set on RigGeometry" << std::endl;
+        std::cerr << "Error: No InfluenceMap set on RigGeometry" << std::endl;
         return false;
     }
 
@@ -179,7 +179,7 @@ bool RigGeometry::initFromParentSkeleton(osg::NodeVisitor* nv)
         Bone* bone = mSkeleton->getBone(it->first);
         if (!bone)
         {
-            std::cerr << "RigGeometry did not find bone " << it->first << std::endl;
+            std::cerr << "Error: RigGeometry did not find bone " << it->first << std::endl;
             continue;
         }
 
@@ -232,7 +232,7 @@ void RigGeometry::update(osg::NodeVisitor* nv)
 {
     if (!mSkeleton)
     {
-        std::cerr << "RigGeometry rendering with no skeleton, should have been initialized by UpdateVisitor" << std::endl;
+        std::cerr << "Error: RigGeometry rendering with no skeleton, should have been initialized by UpdateVisitor" << std::endl;
         // try to recover anyway, though rendering is likely to be incorrect.
         if (!initFromParentSkeleton(nv))
             return;
diff --git a/components/sceneutil/skeleton.cpp b/components/sceneutil/skeleton.cpp
index f3c2aef77..f7c141e20 100644
--- a/components/sceneutil/skeleton.cpp
+++ b/components/sceneutil/skeleton.cpp
@@ -128,7 +128,7 @@ void Skeleton::updateBoneMatrices(unsigned int traversalNumber)
                 mRootBone->mChildren[i]->update(NULL);
         }
         else
-            std::cerr << "no root bone" << std::endl;
+            std::cerr << "Error: no root bone" << std::endl;
 
         mNeedToUpdateBoneMatrices = false;
     }
@@ -188,7 +188,7 @@ void Bone::update(const osg::Matrixf* parentMatrixInSkeletonSpace)
 {
     if (!mNode)
     {
-        std::cerr << "Bone without node " << std::endl;
+        std::cerr << "Error: Bone without node " << std::endl;
         return;
     }
     if (parentMatrixInSkeletonSpace)
diff --git a/components/sceneutil/workqueue.cpp b/components/sceneutil/workqueue.cpp
index 831c70a3f..cc40506f0 100644
--- a/components/sceneutil/workqueue.cpp
+++ b/components/sceneutil/workqueue.cpp
@@ -71,7 +71,7 @@ void WorkQueue::addWorkItem(osg::ref_ptr<WorkItem> item, bool front)
 {
     if (item->isDone())
     {
-        std::cerr << "warning, trying to add a work item that is already completed" << std::endl;
+        std::cerr << "Error: trying to add a work item that is already completed" << std::endl;
         return;
     }