diff --git a/NEWS.txt b/NEWS.txt
index e57e5953b..5f345bd5d 100644
--- a/NEWS.txt
+++ b/NEWS.txt
@@ -22,9 +22,10 @@ The !OpenSceneGraph 2.8 release is the culmination of 9 years of work by the lea
     * New PDF widget support (based on libPoppler)
     * New VNC client widget support (based on libVNCServer) 
     * New Browser client widget support (based on Gecko/UBrowser)
+    * New plugins for loading Half-Life 2 maps and models.
     * Improvements to DatabasePager tailored for low latency paging.
     * Improved stats collection and on screen reporting.
-    * Support for the OpenGL geometry instancing extension.
+    * Support for the OpenGL draw instanced extension.
     * Improvements to COLLADA support.
     * Build reporting using CDash
     * New Packing support using CPack
diff --git a/include/osg/Array b/include/osg/Array
index bf6c400cc..623cb96e6 100644
--- a/include/osg/Array
+++ b/include/osg/Array
@@ -226,8 +226,8 @@ class TemplateArray : public Array, public MixinVector<T>
         }
         
         virtual const GLvoid*   getDataPointer() const { if (!this->empty()) return &this->front(); else return 0; }
-        virtual unsigned int    getTotalDataSize() const { return this->size()*sizeof(T); }
-        virtual unsigned int    getNumElements() const { return this->size(); }
+        virtual unsigned int    getTotalDataSize() const { return static_cast<unsigned int>(this->size()*sizeof(T)); }
+        virtual unsigned int    getNumElements() const { return static_cast<unsigned int>(this->size()); }
 
         typedef T ElementDataType; // expose T
 
@@ -312,8 +312,8 @@ class TemplateIndexArray : public IndexArray, public MixinVector<T>
         }
         
         virtual const GLvoid*   getDataPointer() const { if (!this->empty()) return &this->front(); else return 0; }
-        virtual unsigned int    getTotalDataSize() const { return this->size()*sizeof(T); }
-        virtual unsigned int    getNumElements() const { return this->size(); }
+        virtual unsigned int    getTotalDataSize() const { return static_cast<unsigned int>(this->size()*sizeof(T)); }
+        virtual unsigned int    getNumElements() const { return static_cast<unsigned int>(this->size()); }
 
         virtual unsigned int    index(unsigned int pos) const { return (*this)[pos]; }
 
diff --git a/include/osg/Drawable b/include/osg/Drawable
index e3462be35..217fe47d4 100644
--- a/include/osg/Drawable
+++ b/include/osg/Drawable
@@ -154,7 +154,7 @@ class OSG_EXPORT Drawable : public Object
          * Get the number of parents of node.
          * @return the number of parents of this node.
          */
-        inline unsigned int getNumParents() const { return _parents.size(); }
+        inline unsigned int getNumParents() const { return static_cast<unsigned int>(_parents.size()); }
 
         /** Get the list of matrices that transform this node from local coordinates to world coordinates.
           * The optional Node* haltTraversalAtNode allows the user to prevent traversal beyond a specifed node. */
diff --git a/include/osg/Geometry b/include/osg/Geometry
index 195b416e6..670f55de9 100644
--- a/include/osg/Geometry
+++ b/include/osg/Geometry
@@ -199,7 +199,7 @@ class OSG_EXPORT Geometry : public Drawable
         ArrayData& getTexCoordData(unsigned int index);
         const ArrayData& getTexCoordData(unsigned int index) const;
 
-        unsigned int getNumTexCoordArrays() const {  return _texCoordList.size(); }
+        unsigned int getNumTexCoordArrays() const {  return static_cast<unsigned int>(_texCoordList.size()); }
         ArrayDataList& getTexCoordArrayList() { return _texCoordList; }
         const ArrayDataList& getTexCoordArrayList() const { return _texCoordList; }
 
@@ -219,7 +219,7 @@ class OSG_EXPORT Geometry : public Drawable
         ArrayData& getVertexAttribData(unsigned int index);
         const ArrayData& getVertexAttribData(unsigned int index) const;
 
-        unsigned int getNumVertexAttribArrays() const { return _vertexAttribList.size(); }
+        unsigned int getNumVertexAttribArrays() const { return static_cast<unsigned int>(_vertexAttribList.size()); }
         ArrayDataList& getVertexAttribArrayList() { return _vertexAttribList; }
         const ArrayDataList& getVertexAttribArrayList() const { return _vertexAttribList; }
 
@@ -231,7 +231,7 @@ class OSG_EXPORT Geometry : public Drawable
         PrimitiveSetList& getPrimitiveSetList() { return _primitives; }
         const PrimitiveSetList& getPrimitiveSetList() const { return _primitives; }
 
-        unsigned int getNumPrimitiveSets() const { return _primitives.size(); }
+        unsigned int getNumPrimitiveSets() const { return static_cast<unsigned int>(_primitives.size()); }
         PrimitiveSet* getPrimitiveSet(unsigned int pos) { return _primitives[pos].get(); }
         const PrimitiveSet* getPrimitiveSet(unsigned int pos) const { return _primitives[pos].get(); }
         
diff --git a/include/osg/Group b/include/osg/Group
index 19bd96c0e..8bedbc44c 100644
--- a/include/osg/Group
+++ b/include/osg/Group
@@ -97,7 +97,7 @@ class OSG_EXPORT Group : public Node
         virtual bool replaceChild( Node *origChild, Node* newChild );
 
         /** Return the number of children nodes. */
-        inline unsigned int getNumChildren() const { return _children.size(); }
+        inline unsigned int getNumChildren() const { return static_cast<unsigned int>(_children.size()); }
 
         /** Set child node at position i.
           * Return true if set correctly, false on failure (if node==NULL || i is out of range).
@@ -139,7 +139,7 @@ class OSG_EXPORT Group : public Node
             {
                 if (_children[childNum]==node) return childNum;
             }
-            return _children.size(); // node not found.
+            return static_cast<unsigned int>(_children.size()); // node not found.
         }
 
         /** Set whether to use a mutex to ensure ref() and unref() are thread safe.*/
diff --git a/include/osg/Image b/include/osg/Image
index 32104069b..55593a9d7 100644
--- a/include/osg/Image
+++ b/include/osg/Image
@@ -273,7 +273,7 @@ class OSG_EXPORT Image : public Object
 
         unsigned int getNumMipmapLevels() const
         {
-            return _mipmapData.size()+1;
+            return static_cast<unsigned int>(_mipmapData.size())+1;
         };
 
         /** Send offsets into data. It is assumed that first mipmap offset (index 0) is 0.*/
diff --git a/include/osg/KdTree b/include/osg/KdTree
index 580736cd3..735248f5e 100644
--- a/include/osg/KdTree
+++ b/include/osg/KdTree
@@ -131,7 +131,7 @@ class OSG_EXPORT KdTree : public osg::Shape
 
         int addNode(const KdNode& node)
         {
-            int num = _kdNodes.size(); 
+            int num = static_cast<int>(_kdNodes.size()); 
             _kdNodes.push_back(node); 
             return num;
         }
@@ -147,7 +147,7 @@ class OSG_EXPORT KdTree : public osg::Shape
 
         unsigned int addTriangle(const Triangle& tri)
         {
-            unsigned int num = _triangles.size();
+            unsigned int num = static_cast<unsigned int>(_triangles.size());
             _triangles.push_back(tri);
             return num;
         }
diff --git a/include/osg/Node b/include/osg/Node
index 2174c4e9b..b2247c643 100644
--- a/include/osg/Node
+++ b/include/osg/Node
@@ -144,7 +144,7 @@ class OSG_EXPORT Node : public Object
          * Get the number of parents of node.
          * @return the number of parents of this node.
          */
-        inline unsigned int getNumParents() const { return _parents.size(); }
+        inline unsigned int getNumParents() const { return static_cast<unsigned int>(_parents.size()); }
 
         /** Get the list of node paths parent paths.
           * The optional Node* haltTraversalAtNode allows the user to prevent traversal beyond a specifed node. */
@@ -279,7 +279,7 @@ class OSG_EXPORT Node : public Object
         inline std::string& getDescription(unsigned int i) { return _descriptions[i]; }
 
         /** Get the number of descriptions of the node.*/
-        inline unsigned int getNumDescriptions() const { return _descriptions.size(); }
+        inline unsigned int getNumDescriptions() const { return static_cast<unsigned int>(_descriptions.size()); }
 
         /** Add a description string to the node.*/
         void addDescription(const std::string& desc) { _descriptions.push_back(desc); }
diff --git a/include/osg/OperationThread b/include/osg/OperationThread
index 8ec9b8cbc..e3fda41f7 100644
--- a/include/osg/OperationThread
+++ b/include/osg/OperationThread
@@ -108,7 +108,7 @@ class OSG_EXPORT OperationQueue : public Referenced
         bool empty() const { return _operations.empty(); }
         
         /** Return the num of pending operations that are sitting in the OperationQueue.*/
-        unsigned int getNumOperationsInQueue() const { return _operations.size(); }
+        unsigned int getNumOperationsInQueue() const { return static_cast<unsigned int>(_operations.size()); }
 
         /** Add operation to end of OperationQueue, this will be 
           * executed by the operation thread once this operation gets to the head of the queue.*/
diff --git a/include/osg/PrimitiveSet b/include/osg/PrimitiveSet
index e43257c73..992f57212 100644
--- a/include/osg/PrimitiveSet
+++ b/include/osg/PrimitiveSet
@@ -316,8 +316,8 @@ class OSG_EXPORT DrawArrays : public PrimitiveSet
         virtual void accept(PrimitiveFunctor& functor) const;
         virtual void accept(PrimitiveIndexFunctor& functor) const;
         
-        virtual unsigned int getNumIndices() const { return _count; }
-        virtual unsigned int index(unsigned int pos) const { return _first+pos; }
+        virtual unsigned int getNumIndices() const { return static_cast<unsigned int>(_count); }
+        virtual unsigned int index(unsigned int pos) const { return static_cast<unsigned int>(_first)+pos; }
         virtual void offsetIndices(int offset) { _first += offset; }
 
     protected:
@@ -493,7 +493,7 @@ class OSG_EXPORT DrawElementsUByte : public DrawElements, public VectorGLubyte
         virtual const char* className() const { return "DrawElementsUByte"; }
 
         virtual const GLvoid*   getDataPointer() const { return empty()?0:&front(); }
-        virtual unsigned int    getTotalDataSize() const { return size(); }
+        virtual unsigned int    getTotalDataSize() const { return static_cast<unsigned int>(size()); }
         virtual bool            supportsBufferObject() const { return false; }
 
         virtual void draw(State& state, bool useVertexBufferObjects) const ;
@@ -501,7 +501,7 @@ class OSG_EXPORT DrawElementsUByte : public DrawElements, public VectorGLubyte
         virtual void accept(PrimitiveFunctor& functor) const;
         virtual void accept(PrimitiveIndexFunctor& functor) const;
 
-        virtual unsigned int getNumIndices() const { return size(); }
+        virtual unsigned int getNumIndices() const { return static_cast<unsigned int>(size()); }
         virtual unsigned int index(unsigned int pos) const { return (*this)[pos]; }
         virtual void offsetIndices(int offset);
         
@@ -568,7 +568,7 @@ class OSG_EXPORT DrawElementsUShort : public DrawElements, public VectorGLushort
         virtual const char* className() const { return "DrawElementsUShort"; }
 
         virtual const GLvoid*   getDataPointer() const { return empty()?0:&front(); }
-        virtual unsigned int    getTotalDataSize() const { return 2*size(); }
+        virtual unsigned int    getTotalDataSize() const { return 2u*static_cast<unsigned int>(size()); }
         virtual bool            supportsBufferObject() const { return false; }
 
         virtual void draw(State& state, bool useVertexBufferObjects) const;
@@ -576,7 +576,7 @@ class OSG_EXPORT DrawElementsUShort : public DrawElements, public VectorGLushort
         virtual void accept(PrimitiveFunctor& functor) const;
         virtual void accept(PrimitiveIndexFunctor& functor) const;
 
-        virtual unsigned int getNumIndices() const { return size(); }
+        virtual unsigned int getNumIndices() const { return static_cast<unsigned int>(size()); }
         virtual unsigned int index(unsigned int pos) const { return (*this)[pos]; }
         virtual void offsetIndices(int offset);
 
@@ -642,7 +642,7 @@ class OSG_EXPORT DrawElementsUInt : public DrawElements, public VectorGLuint
         virtual const char* className() const { return "DrawElementsUInt"; }
 
         virtual const GLvoid*   getDataPointer() const { return empty()?0:&front(); }
-        virtual unsigned int    getTotalDataSize() const { return 4*size(); }
+        virtual unsigned int    getTotalDataSize() const { return 4u*static_cast<unsigned int>(size()); }
         virtual bool            supportsBufferObject() const { return false; }
 
         virtual void draw(State& state, bool useVertexBufferObjects) const;
@@ -650,7 +650,7 @@ class OSG_EXPORT DrawElementsUInt : public DrawElements, public VectorGLuint
         virtual void accept(PrimitiveFunctor& functor) const;
         virtual void accept(PrimitiveIndexFunctor& functor) const;
 
-        virtual unsigned int getNumIndices() const { return size(); }
+        virtual unsigned int getNumIndices() const { return static_cast<unsigned int>(size()); }
         virtual unsigned int index(unsigned int pos) const { return (*this)[pos]; }
         virtual void offsetIndices(int offset);
 
diff --git a/include/osg/Program b/include/osg/Program
index 409d29a50..38dfaf751 100644
--- a/include/osg/Program
+++ b/include/osg/Program
@@ -83,7 +83,7 @@ class OSG_EXPORT Program : public osg::StateAttribute
           * Mark Program as needing relink.  Return true for success */
         bool addShader( Shader* shader );
 
-        unsigned int getNumShaders() const { return _shaderList.size(); }
+        unsigned int getNumShaders() const { return static_cast<unsigned int>(_shaderList.size()); }
 
         Shader* getShader( unsigned int i ) { return _shaderList[i].get(); }
         const Shader* getShader( unsigned int i ) const { return _shaderList[i].get(); }
diff --git a/include/osg/Shape b/include/osg/Shape
index b532edca6..507abd7b6 100644
--- a/include/osg/Shape
+++ b/include/osg/Shape
@@ -609,7 +609,7 @@ class OSG_EXPORT CompositeShape : public Shape
         const Shape* getShape() const { return _shape.get(); }
 
         /** Get the number of children of this composite shape.*/
-        unsigned int getNumChildren() const { return _children.size(); }
+        unsigned int getNumChildren() const { return static_cast<unsigned int>(_children.size()); }
 
         /** Get a child.*/
         Shape* getChild(unsigned int i) { return _children[i].get(); }
@@ -631,7 +631,7 @@ class OSG_EXPORT CompositeShape : public Shape
             {
                 if (_children[childNo]==shape) return childNo;
             }
-            return _children.size(); // node not found.
+            return static_cast<unsigned int>(_children.size()); // node not found.
 
         }
 
diff --git a/include/osg/State b/include/osg/State
index 6214fb733..1db439b17 100644
--- a/include/osg/State
+++ b/include/osg/State
@@ -134,7 +134,7 @@ class OSG_EXPORT State : public Referenced, public Observer
         void removeStateSet(unsigned int pos);
         
         /** Get the number of StateSet's on the StateSet stack.*/
-        unsigned int getStateSetStackSize() { return _stateStateStack.size(); }
+        unsigned int getStateSetStackSize() { return static_cast<unsigned int>(_stateStateStack.size()); }
         
         /** Pop StateSet's for the StateSet stack till its size equals the specified size.*/
         void popStateSetStackToSize(unsigned int size) { while (_stateStateStack.size()>size) popStateSet(); }
diff --git a/include/osg/StateAttribute b/include/osg/StateAttribute
index d7c4f23a0..d4c75b241 100644
--- a/include/osg/StateAttribute
+++ b/include/osg/StateAttribute
@@ -256,7 +256,7 @@ class OSG_EXPORT StateAttribute : public Object
          * Get the number of parents of this StateAttribute.
          * @return the number of parents of this StateAttribute.
          */
-        inline unsigned int getNumParents() const { return _parents.size(); }
+        inline unsigned int getNumParents() const { return static_cast<unsigned int>(_parents.size()); }
 
 
         struct ModeUsage
diff --git a/include/osg/StateSet b/include/osg/StateSet
index 03ea009c7..e40626bf4 100644
--- a/include/osg/StateSet
+++ b/include/osg/StateSet
@@ -89,7 +89,7 @@ class OSG_EXPORT StateSet : public Object
          * Get the number of parents of this StateSet.
          * @return the number of parents of this StateSet.
          */
-        inline unsigned int getNumParents() const { return _parents.size(); }
+        inline unsigned int getNumParents() const { return static_cast<unsigned int>(_parents.size()); }
 
 
         /** Compute the DataVariance based on an assessment of callback etc.*/
diff --git a/include/osg/Stats b/include/osg/Stats
index f5a2bb65b..129a892fc 100644
--- a/include/osg/Stats
+++ b/include/osg/Stats
@@ -38,7 +38,7 @@ class OSG_EXPORT Stats : public osg::Referenced
         
         void allocate(unsigned int numberOfFrames);
         
-        int getEarliestFrameNumber() const { return _latestFrameNumber < static_cast<int>(_attributeMapList.size()) ? 0 : _latestFrameNumber - _attributeMapList.size() + 1; }
+        int getEarliestFrameNumber() const { return _latestFrameNumber < static_cast<int>(_attributeMapList.size()) ? 0 : _latestFrameNumber - static_cast<int>(_attributeMapList.size()) + 1; }
         int getLatestFrameNumber() const { return _latestFrameNumber; }
         
         typedef std::map<std::string, double> AttributeMap;
@@ -102,7 +102,7 @@ class OSG_EXPORT Stats : public osg::Referenced
             if (frameNumber < getEarliestFrameNumber()) return -1;
             
             if (frameNumber >= _baseFrameNumber) return frameNumber - _baseFrameNumber;
-            else return _attributeMapList.size() - (_baseFrameNumber-frameNumber);
+            else return static_cast<int>(_attributeMapList.size()) - (_baseFrameNumber-frameNumber);
         }
 
         std::string         _name;
diff --git a/include/osg/View b/include/osg/View
index 653b14cd0..3311cbaf9 100644
--- a/include/osg/View
+++ b/include/osg/View
@@ -131,7 +131,7 @@ class OSG_EXPORT View : public virtual osg::Object
 
         bool removeSlave(unsigned int pos);
 
-        unsigned int getNumSlaves() const { return _slaves.size(); }
+        unsigned int getNumSlaves() const { return static_cast<unsigned int>(_slaves.size()); }
 
         Slave& getSlave(unsigned int pos) { return _slaves[pos]; }
         const Slave& getSlave(unsigned int pos) const { return _slaves[pos]; }
diff --git a/include/osgVolume/Property b/include/osgVolume/Property
index f0ddc89cf..909d60eca 100644
--- a/include/osgVolume/Property
+++ b/include/osgVolume/Property
@@ -180,8 +180,6 @@ class OSGVOLUME_EXPORT ScalarProperty : public Property
 {
     public:
 
-        ScalarProperty();
-
         ScalarProperty(const std::string& scaleName, float value);
         
         ScalarProperty(const ScalarProperty& scalarProperty,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
@@ -206,6 +204,8 @@ class OSGVOLUME_EXPORT ScalarProperty : public Property
     
         virtual ~ScalarProperty() {}
         
+        ScalarProperty();
+
         osg::ref_ptr<osg::Uniform>  _uniform;
 };