I'm a big apple fan, but I have to say that all versions of Apple's DVD player seem a bit sub-standard and have caused me constant headaches. The player consistently craps out when playing slightly scratched DVDs, especially rentals. Even the latest version on Tiger gives up on about half of all rented DVDs I play. It seems to have almost no error recovery ability at all. Its extremely annoying to only be able to watch SOME of a movie. I've discovered an alternative free media player called VLC available for download here: http://www.versiontracker.com/dyn/moreinfo/macosx/14738 VLC rules. It seems to be able to play any of the DVDs that Apple's own player cannot, no matter how scratched up they are. To use it you just download it, install it, then shove the DVD in and choose file > open disk.