diff --git a/include/osg/ClippingVolume b/include/osg/ClippingVolume
index b2ae10d3e..080ad676f 100644
--- a/include/osg/ClippingVolume
+++ b/include/osg/ClippingVolume
@@ -46,7 +46,7 @@ class SG_EXPORT ClippingVolume
         /** Create a ClippingVolume with is cube, centered at 0,0,0, with sides of 2 units.*/
         void setToUnitFrustum()
         {
-            _planeList.clear();
+            _planeList.erase(_planeList.begin(),_planeList.end());
             _planeList.push_back(Plane(1.0f,0.0f,0.0f,1.0f)); // left plane.
             _planeList.push_back(Plane(-1.0f,0.0f,0.0f,1.0f)); // right plane.
             _planeList.push_back(Plane(0.0f,1.0f,0.0f,1.0f)); // bottom plane.
@@ -58,7 +58,7 @@ class SG_EXPORT ClippingVolume
 
         void setToUnitFrustumWithoutNearFar()
         {
-            _planeList.clear();
+            _planeList.erase(_planeList.begin(),_planeList.end());
             _planeList.push_back(Plane(1.0f,0.0f,0.0f,1.0f)); // left plane.
             _planeList.push_back(Plane(-1.0f,0.0f,0.0f,1.0f)); // right plane.
             _planeList.push_back(Plane(0.0f,1.0f,0.0f,1.0f)); // bottom plane.
@@ -68,6 +68,7 @@ class SG_EXPORT ClippingVolume
 
         inline void set(const ClippingVolume& cs, const unsigned int mask)
         {
+            _planeList.erase(_planeList.begin(),_planeList.end());
             unsigned int selector_mask = 0x1;
             for(PlaneList::const_iterator itr=cs._planeList.begin();
                 itr!=cs._planeList.end();
@@ -97,6 +98,8 @@ class SG_EXPORT ClippingVolume
                 _localMask = (_localMask<<1) | 1;
             }
         }
+        
+        unsigned int getLocalMask() const { return _localMask; }
 
 
         /** Check whether a vertex is contained with clipping set.*/
diff --git a/src/osgUtil/CullVisitor.cpp b/src/osgUtil/CullVisitor.cpp
index 888024c9a..ad09efd78 100644
--- a/src/osgUtil/CullVisitor.cpp
+++ b/src/osgUtil/CullVisitor.cpp
@@ -169,8 +169,13 @@ void CullVisitor::reset()
 
 void CullVisitor::pushClippingVolume()
 {
-    _modelviewClippingVolumeStack.push_back(_projectionClippingVolumeStack.back());
-    if (!_modelviewStack.empty()) _modelviewClippingVolumeStack.back().transformProvidingInverse(*_modelviewStack.back());
+    _modelviewClippingVolumeStack.push_back(osg::ClippingVolume());
+    osg::ClippingVolume& cv = _modelviewClippingVolumeStack.back();
+    //cv.set(_projectionClippingVolumeStack.back());
+    cv.set(_projectionClippingVolumeStack.back(),_cullingModeStack.back());
+    _cullingModeStack.push_back(cv.getLocalMask() | (_cullingModeStack.back()&SMALL_FEATURE_CULLING));
+
+    if (!_modelviewStack.empty()) cv.transformProvidingInverse(*_modelviewStack.back());
 
     _MVPW_Stack.push_back(0L);
 
@@ -181,7 +186,8 @@ void CullVisitor::popClippingVolume()
 {
     _modelviewClippingVolumeStack.pop_back();
     _MVPW_Stack.pop_back();
-
+    _cullingModeStack.pop_back();
+    
     _windowToModelFactorDirty = true;
 }
 
diff --git a/src/osgUtil/Optimizer.cpp b/src/osgUtil/Optimizer.cpp
index 1243de6de..399b29c33 100644
--- a/src/osgUtil/Optimizer.cpp
+++ b/src/osgUtil/Optimizer.cpp
@@ -527,7 +527,7 @@ void Optimizer::FlattenStaticTransformsVisitor::removeTransforms()
         
             osg::ref_ptr<osg::Transform> transform = titr->first;
             osg::ref_ptr<osg::Group>     group = osgNew osg::Group;
-
+            group->setDataVariance(osg::Object::STATIC);
             for(unsigned int i=0;i<transform->getNumChildren();++i)
             {
                 for(unsigned int j=0;j<transform->getNumParents();++j)
@@ -562,7 +562,7 @@ void Optimizer::RemoveRedundentNodesVisitor::apply(osg::Group& group)
             if (!group.getUserData() &&
                 !group.getAppCallback() &&
                 !group.getStateSet() &&
-                group.getNodeMask()!=0xffffffff)
+                group.getNodeMask()==0xffffffff)
             {
                 _redundentNodeList.insert(&group);
             }