Since upgrading to Snow Leopard, I have found that trying to take screenshots of videos I bought from iTunes won't work. The resulting image is just white and gray squares where the video should be. If I try to do +Shift+3 instead of +Shift, everything shows up, except the area where the video is. Is this a function Apple removed from Snow Leopard? When I tried to take a screenshot of an unprotected video, it worked fine.