My Late 2008 uMBP 2.53 Ghz sometimes freezes while watching videos. I think it has only happened while watching videos...don't remember it happening any other time. It's happened several times before, but I figure I'd finally ask about it now before the warranty is up. What happens is I'll be watching a video online, then everything just completely freezes. Nothing works: mouse doesn't move, keyboard doesn't work, video stops, etc. The last split second of audio will just keep repeating over and over like a broken record. I have to hold the power button and do a hard reset to get it working again. It's not really reproducible on command. Not sure what causes it. Might be heat? But iStat menus this time showed the temp at 73*C when it froze, so it's shouldn't be overheating yet. Running 10.5.8, and it's happened with 10.5.7, 10.5.6 and might have happened in 10.5.5 too (don't remember), so it's definitely not a fault of the OS updates. This time was on the 9600M card, but before was on the 9400M card. Any ideas or suggestions?