Having an irritating problem with my 17" powerbook (1 ghz). Ever since installing Panther I get stutter on all video playback. I first noticed the problem in DVD player. Every 8-12 seconds the video will freeze for an instant and then start again. I've since noticed the same problem in quicktime player and real player. I never had the problem when running DVD player Jaguar. I've tried turning everything else off, running on battery power, setting the display to thousands of colors, etc. etc. Nothing seems to help. Ideas?