diff --git a/apps/openmw/mwgui/container.cpp b/apps/openmw/mwgui/container.cpp
index 85c2cf5fb..bc869e5fe 100644
--- a/apps/openmw/mwgui/container.cpp
+++ b/apps/openmw/mwgui/container.cpp
@@ -88,8 +88,13 @@ namespace MWGui
 
         mDragAndDropWidget->setVisible(false);
 
-        targetModel->copyItem(mItem, mDraggedCount);
-        mSourceModel->removeItem(mItem, mDraggedCount);
+        // If item is dropped where it was taken from, we don't need to do anything -
+        // otherwise, do the transfer
+        if (targetModel != mSourceModel)
+        {
+            targetModel->copyItem(mItem, mDraggedCount);
+            mSourceModel->removeItem(mItem, mDraggedCount);
+        }
 
         mSourceModel->update();
 
diff --git a/apps/openmw/mwgui/containeritemmodel.cpp b/apps/openmw/mwgui/containeritemmodel.cpp
index e23b4f77f..eff8fbcc1 100644
--- a/apps/openmw/mwgui/containeritemmodel.cpp
+++ b/apps/openmw/mwgui/containeritemmodel.cpp
@@ -74,13 +74,12 @@ ItemModel::ModelIndex ContainerItemModel::getIndex (ItemStack item)
 void ContainerItemModel::copyItem (const ItemStack& item, size_t count)
 {
     const MWWorld::Ptr& source = mItemSources[mItemSources.size()-1];
+    if (item.mBase.getContainerStore() == &source.getClass().getContainerStore(source))
+        throw std::runtime_error("Item to copy needs to be from a different container!");
     int origCount = item.mBase.getRefData().getCount();
     item.mBase.getRefData().setCount(count);
-    MWWorld::ContainerStoreIterator it = MWWorld::Class::get(source).getContainerStore(source).add(item.mBase, source);
-    if (*it != item.mBase)
-        item.mBase.getRefData().setCount(origCount);
-    else
-        item.mBase.getRefData().setCount(origCount + count); // item copied onto itself
+    source.getClass().getContainerStore(source).add(item.mBase, source);
+    item.mBase.getRefData().setCount(origCount);
 }
 
 void ContainerItemModel::removeItem (const ItemStack& item, size_t count)
diff --git a/apps/openmw/mwgui/inventoryitemmodel.cpp b/apps/openmw/mwgui/inventoryitemmodel.cpp
index ec3bb3b30..62a5a75f0 100644
--- a/apps/openmw/mwgui/inventoryitemmodel.cpp
+++ b/apps/openmw/mwgui/inventoryitemmodel.cpp
@@ -40,13 +40,12 @@ ItemModel::ModelIndex InventoryItemModel::getIndex (ItemStack item)
 
 void InventoryItemModel::copyItem (const ItemStack& item, size_t count)
 {
+    if (item.mBase.getContainerStore() == &mActor.getClass().getContainerStore(mActor))
+        throw std::runtime_error("Item to copy needs to be from a different container!");
     int origCount = item.mBase.getRefData().getCount();
     item.mBase.getRefData().setCount(count);
-    MWWorld::ContainerStoreIterator it = MWWorld::Class::get(mActor).getContainerStore(mActor).add(item.mBase, mActor);
-    if (*it != item.mBase)
-        item.mBase.getRefData().setCount(origCount);
-    else
-        item.mBase.getRefData().setCount(origCount + count); // item copied onto itself
+    mActor.getClass().getContainerStore(mActor).add(item.mBase, mActor);
+    item.mBase.getRefData().setCount(origCount);
 }
 
 
diff --git a/apps/openmw/mwrender/renderingmanager.cpp b/apps/openmw/mwrender/renderingmanager.cpp
index ade871a94..a7e35fa19 100644
--- a/apps/openmw/mwrender/renderingmanager.cpp
+++ b/apps/openmw/mwrender/renderingmanager.cpp
@@ -652,7 +652,8 @@ void RenderingManager::requestMap(MWWorld::Ptr::CellStore* cell)
         Ogre::Vector2 center(cell->mCell->getGridX() + 0.5, cell->mCell->getGridY() + 0.5);
         dims.merge(mTerrain->getWorldBoundingBox(center));
 
-        mTerrain->update(dims.getCenter());
+        if (dims.isFinite())
+            mTerrain->update(dims.getCenter());
 
         mLocalMap->requestMap(cell, dims.getMinimum().z, dims.getMaximum().z);
     }
diff --git a/apps/openmw/mwworld/cellstore.cpp b/apps/openmw/mwworld/cellstore.cpp
index 8bb3d3c8d..0c145ab60 100644
--- a/apps/openmw/mwworld/cellstore.cpp
+++ b/apps/openmw/mwworld/cellstore.cpp
@@ -43,7 +43,8 @@ namespace MWWorld
         // Skip this when reference was deleted.
         // TODO: Support respawning references, in this case, we need to track it somehow.
         if (ref.mDeleted) {
-            mList.erase(iter);
+            if (iter != mList.end())
+                mList.erase(iter);
             return;
         }