I just tried using iChat for the first time in SL (I usually use Skype) and experienced something *very* odd. First, the specs: Late-2007 MBP 2.4 GHz Core 2 Duo 4 GB RAM GeForce 8600M GT The problem: For the first few seconds of a chat, the video quality was gorgeous. But then my hard drive(?) (could've been the fans, I dunno) would start getting really loud (it sounded like a particularly intense Time Machine backup) and the video got extremely "blocky" until it was basically useless; after a few minutes the audio started to go, too. We tried this a couple times with the same results. I rebooted my computer & AirPort, but no change. My chat partner experienced no problems with audio or video (he's also on SL). According to SpeedTest.net, my connection speeds are 12.31 Mb/s down/1.13 Mb/s up. Skype and Google Talk video continue to work just fine. Any ideas?