From Wang Rui, "I modified the Serializer header to add a UPDATE_TO_VERSION_SCOPED

macro, which could set version within brackets and reset it after
that. All related serializers are also modified so that the
backward-compatibility bug reported by Farshid can be fixed.
"

From Robert Osfield, removed the use of osg::Referenced and creating the proxy object on the heap.

src/osgWrappers/serializers/osg/Object.cpp

@@ -42,9 +42,8 @@ REGISTER_OBJECT_WRAPPER( Object,
     END_ENUM_SERIALIZER();  // _dataVariance
 
     ADD_USER_SERIALIZER( UserData );  // _userData, deprecated
-
-    UPDATE_TO_VERSION( 77 )
     {
+        UPDATE_TO_VERSION_SCOPED( 77 )
         REMOVE_SERIALIZER( UserData );
         ADD_OBJECT_SERIALIZER( UserDataContainer, osg::UserDataContainer, NULL );
     }