No it wasn't. It came up in a handful of labs and in each case, it seemed to mysteriously start happening without any changes to the system. In some cases, the effect stopped as mysetriously as it started. We have a special version of DirectRT v2008 that has been redesigned for Vista (it also works on XP). It's currently in testing and it does not seem to do this--probably because it uses the very latest in DirectX and .NET technology. Let us know if you would like to be a beta tester.