I'm on a mac, OSX, 1.42ghz G4, 1GB of ram. For some reason, no matter the divx like decoder, if the audio is compressed using mp3, Quicktime decides it won't play the audio. It'll stutter for the first few moments then not work at all. A DIVX file with audio compressed in something else works just fine. A single mp3 alone without a video file will play just fine as well. What is going on here?