I've been using iChat A/V since it's release and it's been working beautifully. I've even got an iSight and have been chatting no problem w/ it. Just the other day I started up iChat turned on my iSight tried to view myself by clicking the video camera by name and iSight unexpectedly quit. I tried and again and the same thing. I tried having my friend invite me to a video chat...as soon as I accept it quits. I tried inviting someone....same thing. I tried just doing audio....same thing. I tried throwing out all iChat files and reinstalling. SAME THING. Anyone else have this problem or a suggestion on how to fix?