I created a movie with MacDivxCreator and fixed the audio with Divx Doctor. The audio didn't sync, so I synced it with QT Mutator. Everything plays fine and audio is synced perfectly but after the movie plays for a while the audio and video get out of sync. But, if I pause it for a second and then resume, then they will be in sync again. Is this happening just because I have a slow cpu (G3 350) or is there a way I can fix this?