So I was running a few apps (nothing out of the ordinary) and I had a DVD running and when I tried using expose to check another window it wasnt working. Parts of my OS would work like the upper bar but I couldnt open my dock or anything else. I tried shutting down/restarting but when i hit the power button the screen would come up but the buttons wouldnt do anything. I tried putting it to sleep and awakening it but that also did nothing. Finally at last resort I had to unplug my ibook and then take out the battery (which I am guessing is terrible for it?) I am not using Tiger, still on Panther, so I don't think it is an OS bug. So what should I do? Was this a one time fluke or should I report it to Apple?