I installed NVIDIAs beta driver with the new CUDA engine enabled and the latest PhysX pack. Then I watched a Bluray with PowerDVD 8 and noticed a weird behavior. It has something to do with the driver cause when I roll back to a normal one playback is normal again. The video window is ALWAYS on top of the desktop. You can't even use PDVDs right click menu cause its hidden behind the video window. You can however move the video window or toggle between window and fullscreen. I wonder if NVIDIAS new CUDA architecture also introduces a new video processing engine. PQ also seems to be better but this could be a placebo effect. Using Vista Ultimate 64 btw.