Whenever I export to QT, after a few seconds of playing the screen glitches out in several spots, like "bad tv" effect. Example here: http://youtu.be/7TuVNmu4Yqo
Any ideas? Other formats like mp4 work fine. CS5.5. I reinstalled quicktime. Export RGB+alpha. Computer is a couple months old but haven't had any similar problems like this. I need the transparency otherwise I wouldn't bother.