From Brede Johansen, "The attached file updates the framestamp and traversal number of the

updatevisitor in osgViewer::Viewer.

The bug prevented DOF animations because osgSim::DOFTransform checks
the traversal number before doing any updates."

src/osgViewer/Viewer.cpp

@@ -1372,6 +1372,10 @@ void Viewer::updateTraversal()
 
     double beginUpdateTraversal = osg::Timer::instance()->delta_s(_startTick, osg::Timer::instance()->tick());
 
+    _updateVisitor->reset();
+    _updateVisitor->setFrameStamp(getFrameStamp());
+    _updateVisitor->setTraversalNumber(getFrameStamp()->getFrameNumber());
+
     if (getSceneData())
     {
         getSceneData()->accept(*_updateVisitor);