I just got a new Casio Exilim EX-Z750 (7.2MP ) camera for Christmas, shot some movies with it, and imported them into iPhoto. The camera records in MPEG-4 format (which I believe QT supports), but when I try to play the clips through QT, I have sound but no video (just a white screen). Now if I try to play the clips in VLC, they play no problem. I've downloaded the 3ivx and Divx codecs but neither of them gave me video. Actually, after I installed the 3ivx codec, I got garbled video, heh. The "Show Movie Info" tab says "3ivx D4 4.5.1, 640x360, Millions DVI ADPCM, Mono, 44.100 kHz" under Format. Does anyone have any idea as to why these clips aren't playing in QT, but play fine in VLC? Normally, I wouldn't mind using VLC, but when you open clips through iPhoto, it automatically opens up with QT and the only way I know how to get them to play in VLC, is to drag 'n drop from iPhoto onto my desktop, then open from there. Pain in the butt . Thanks!