Changed the DatabasePager so that it bypasses the Registry::readNode() method and calls

readNodeImplementation() directly to avoid calling the KdTreeBuilder.   

Updated wrappers.

include/osg/KdTree

@@ -227,6 +227,10 @@ class OSG_EXPORT KdTreeBuilder : public osg::NodeVisitor
     
         KdTreeBuilder();
     
+        KdTreeBuilder(const KdTreeBuilder& rhs);
+
+        virtual KdTreeBuilder* clone() { return new KdTreeBuilder(*this); }
+
         void apply(osg::Geode& geode);
     
         KdTree::BuildOptions _buildOptions;

include/osgDB/DatabasePager

@@ -104,6 +104,8 @@ class OSGDB_EXPORT DatabasePager : public osg::NodeVisitor::DatabaseRequestHandl
             
             virtual void run();
             
+            osg::ref_ptr<osg::Node> dpReadRefNodeFile(const std::string& fileName,const ReaderWriter::Options* options);
+
         protected:
 
             virtual ~DatabaseThread();

include/osgDB/Registry

@@ -320,7 +320,8 @@ class OSGDB_EXPORT Registry : public osg::Referenced
 
             if (doKdTreeBuilder && _kdTreeBuilder.valid() && result.validNode()) 
             {
-                result.getNode()->accept(*_kdTreeBuilder);
+                osg::ref_ptr<osg::KdTreeBuilder> builder = _kdTreeBuilder->clone();
+                result.getNode()->accept(*builder);
             }
         }