Arrgghhh! I'm getting weird behaviour from Windows Media Player 9. If I play a video, I have to keep the mouse near the top left of the player's window. If I move it down to the bottom right, the video is offset to the point I can't see it. So basically, if I move the mouse down, the movie slides upward; if I move the mouse to the right, it slides to the left. Weird! It's like the window relative mouse position is getting subtracted from the video draw offset.