diff --git a/include/osgDB/DatabasePager b/include/osgDB/DatabasePager
index f8291b767..071a2540d 100644
--- a/include/osgDB/DatabasePager
+++ b/include/osgDB/DatabasePager
@@ -45,6 +45,19 @@ class OSGDB_EXPORT DatabasePager : public osg::NodeVisitor::DatabaseRequestHandl
 
         DatabasePager();
 
+        DatabasePager(const DatabasePager& rhs);
+        
+        /** Create a shallow copy on the DatabasePager.*/
+        virtual DatabasePager* clone() const { return new DatabasePager(*this); }
+
+        /** get the prototype singleton used by DatabasePager::create().*/
+        static osg::ref_ptr<DatabasePager>& prototype();
+        
+        /** create a DatabasePager by cloning DatabasePager::prototype().*/
+        static DatabasePager* create();
+
+        
+
         /** Add a request to load a node file to end the the database request list.*/
         virtual void requestNodeFile(const std::string& fileName,osg::Group* group,
                                      float priority, const osg::FrameStamp* framestamp);
diff --git a/include/osgUtil/CullVisitor b/include/osgUtil/CullVisitor
index cf1c4eb67..c0d526fc1 100644
--- a/include/osgUtil/CullVisitor
+++ b/include/osgUtil/CullVisitor
@@ -53,9 +53,18 @@ class OSGUTIL_EXPORT CullVisitor : public osg::NodeVisitor, public osg::CullStac
     
 
         CullVisitor();
-        virtual ~CullVisitor();
+        
+        /// Copy constructor that does a shallow copy.
+        CullVisitor(const CullVisitor&);
 
-        virtual CullVisitor* cloneType() const { return new CullVisitor(); }
+        /** Create a shallow copy on the CullVisitor.*/
+        virtual CullVisitor* clone() const { return new CullVisitor(*this); }
+
+        /** get the prototype singleton used by CullVisitor::create().*/
+        static osg::ref_ptr<CullVisitor>& prototype();
+        
+        /** create a CullVisitor by cloning CullVisitor::prototype().*/
+        static CullVisitor* create();
 
         virtual void reset();
 
@@ -258,6 +267,8 @@ class OSGUTIL_EXPORT CullVisitor : public osg::NodeVisitor, public osg::CullStac
 
     protected:
 
+        virtual ~CullVisitor();
+
         /** Prevent unwanted copy operator.*/
         CullVisitor& operator = (const CullVisitor&) { return *this; }
         
diff --git a/src/osgDB/DatabasePager.cpp b/src/osgDB/DatabasePager.cpp
index f5e49540e..7ea949c05 100644
--- a/src/osgDB/DatabasePager.cpp
+++ b/src/osgDB/DatabasePager.cpp
@@ -115,11 +115,62 @@ DatabasePager::DatabasePager()
         //osgDB::Registry::instance()->setUseObjectCacheHint(true);
 }
 
+DatabasePager::DatabasePager(const DatabasePager& rhs)
+{
+    //osg::notify(osg::INFO)<<"Constructing DatabasePager(const DatabasePager& )"<<std::endl;
+    
+    _startThreadCalled = false;
+
+    _done = false;
+    _acceptNewRequests = true;
+    _databasePagerThreadPaused = false;
+    
+    _useFrameBlock = rhs._useFrameBlock;
+    _numFramesActive = 0;
+    _frameNumber = 0;
+    _frameBlock = new osg::RefBlock;
+    _databasePagerThreadBlock = new osg::RefBlock;
+
+    _threadPriorityDuringFrame = rhs._threadPriorityDuringFrame;
+    _threadPriorityOutwithFrame = rhs._threadPriorityOutwithFrame;
+
+    _drawablePolicy = rhs._drawablePolicy;
+
+    _changeAutoUnRef = rhs._changeAutoUnRef;
+    _valueAutoUnRef = rhs._valueAutoUnRef;
+    _changeAnisotropy = rhs._changeAnisotropy;
+    _valueAnisotropy = rhs._valueAnisotropy;
+
+
+    _deleteRemovedSubgraphsInDatabaseThread = rhs._deleteRemovedSubgraphsInDatabaseThread;
+    
+    _expiryDelay = rhs._expiryDelay;
+    _doPreCompile = rhs._doPreCompile;
+    _targetFrameRate = rhs._targetFrameRate;
+    _minimumTimeAvailableForGLCompileAndDeletePerFrame = rhs._minimumTimeAvailableForGLCompileAndDeletePerFrame;
+    _maximumNumOfObjectsToCompilePerFrame = rhs._maximumNumOfObjectsToCompilePerFrame;
+}
+
+
 DatabasePager::~DatabasePager()
 {
     cancel();
 }
 
+osg::ref_ptr<DatabasePager>& DatabasePager::prototype()
+{
+    static osg::ref_ptr<DatabasePager> s_DatabasePager = new DatabasePager;
+    return s_DatabasePager;
+}
+
+DatabasePager* DatabasePager::create()
+{
+    return DatabasePager::prototype().valid() ? 
+           DatabasePager::prototype()->clone() :
+           new DatabasePager; 
+}
+
+
 int DatabasePager::cancel()
 {
     int result = 0;
diff --git a/src/osgUtil/CullVisitor.cpp b/src/osgUtil/CullVisitor.cpp
index 29dbfc0a2..3671702f2 100644
--- a/src/osgUtil/CullVisitor.cpp
+++ b/src/osgUtil/CullVisitor.cpp
@@ -98,15 +98,38 @@ CullVisitor::CullVisitor():
     _currentReuseRenderLeafIndex(0),
     _numberOfEncloseOverrideRenderBinDetails(0)
 {
-    // _nearFarRatio = 0.000005f;     
 }
 
+CullVisitor::CullVisitor(const CullVisitor& rhs):
+    NodeVisitor(rhs),
+    CullStack(rhs),
+    _currentStateGraph(NULL),
+    _currentRenderBin(NULL),
+    _computed_znear(FLT_MAX),
+    _computed_zfar(-FLT_MAX),
+    _currentReuseRenderLeafIndex(0),
+    _numberOfEncloseOverrideRenderBinDetails(0)
+{
+}
 
 CullVisitor::~CullVisitor()
 {
     reset();
 }
 
+osg::ref_ptr<CullVisitor>& CullVisitor::prototype()
+{
+    static osg::ref_ptr<CullVisitor> s_CullVisitor = new CullVisitor;
+    return s_CullVisitor;
+}
+
+CullVisitor* CullVisitor::create()
+{
+    return CullVisitor::prototype().valid() ? 
+           CullVisitor::prototype()->clone() :
+           new CullVisitor; 
+}
+
 
 void CullVisitor::reset()
 {
diff --git a/src/osgUtil/SceneView.cpp b/src/osgUtil/SceneView.cpp
index b75024b6f..ec13abd30 100644
--- a/src/osgUtil/SceneView.cpp
+++ b/src/osgUtil/SceneView.cpp
@@ -217,7 +217,7 @@ void SceneView::setDefaults(unsigned int options)
     
     _updateVisitor = new UpdateVisitor;
 
-    _cullVisitor = new CullVisitor;
+    _cullVisitor = CullVisitor::create();
 
     _cullVisitor->setStateGraph(_rendergraph.get());
     _cullVisitor->setRenderStage(_renderStage.get());
@@ -566,7 +566,7 @@ void SceneView::cull()
     if (!_cullVisitor)
     {
         osg::notify(osg::INFO) << "Warning: no valid osgUtil::SceneView:: attached, creating a default CullVisitor automatically."<< std::endl;
-        _cullVisitor = new CullVisitor;
+        _cullVisitor = CullVisitor::create();
     }
     if (!_rendergraph)
     {
@@ -613,11 +613,11 @@ void SceneView::cull()
         else
         {
 
-            if (!_cullVisitorLeft.valid()) _cullVisitorLeft = dynamic_cast<CullVisitor*>(_cullVisitor->cloneType());
+            if (!_cullVisitorLeft.valid()) _cullVisitorLeft = dynamic_cast<CullVisitor*>(_cullVisitor->clone());
             if (!_rendergraphLeft.valid()) _rendergraphLeft = dynamic_cast<StateGraph*>(_rendergraph->cloneType());
             if (!_renderStageLeft.valid()) _renderStageLeft = dynamic_cast<RenderStage*>(_renderStage->clone(osg::CopyOp::DEEP_COPY_ALL));
 
-            if (!_cullVisitorRight.valid()) _cullVisitorRight = dynamic_cast<CullVisitor*>(_cullVisitor->cloneType());
+            if (!_cullVisitorRight.valid()) _cullVisitorRight = dynamic_cast<CullVisitor*>(_cullVisitor->clone());
             if (!_rendergraphRight.valid()) _rendergraphRight = dynamic_cast<StateGraph*>(_rendergraph->cloneType());
             if (!_renderStageRight.valid()) _renderStageRight = dynamic_cast<RenderStage*>(_renderStage->clone(osg::CopyOp::DEEP_COPY_ALL));
             
diff --git a/src/osgViewer/Renderer.cpp b/src/osgViewer/Renderer.cpp
index 717dddaf4..5169fdb04 100644
--- a/src/osgViewer/Renderer.cpp
+++ b/src/osgViewer/Renderer.cpp
@@ -156,8 +156,8 @@ Renderer::Renderer(osg::Camera* camera):
     _sceneView[0]->setDisplaySettings(ds);
     _sceneView[1]->setDisplaySettings(ds);
 
-    _sceneView[0]->setCamera(_camera.get());
-    _sceneView[1]->setCamera(_camera.get());
+    _sceneView[0]->setCamera(_camera.get(), false);
+    _sceneView[1]->setCamera(_camera.get(), false);
 
     _currentCull = 0;
     _currentDraw = 0;
diff --git a/src/osgViewer/Scene.cpp b/src/osgViewer/Scene.cpp
index d82c428e3..289bc78a4 100644
--- a/src/osgViewer/Scene.cpp
+++ b/src/osgViewer/Scene.cpp
@@ -26,7 +26,7 @@ Scene::Scene():
     _updateVisitor = new osgUtil::UpdateVisitor;
     _updateVisitor->setFrameStamp(_frameStamp.get());
     
-    setDatabasePager(new osgDB::DatabasePager);
+    setDatabasePager(osgDB::DatabasePager::create());
 }
 
 Scene::~Scene()