Audio/Video re-synch

I don't think this is a Gknot question, but this has happened both with Xmpeg and Gknot now. Basically, I followed the guide to make a movie...movie looks great...audio is fine etc etc. When I play it back it's fine until every so often when the video and audio re-synch itself causing it to skip ahead ever so slightly, but definately noticeable. It is as if it were temporarily fast-forwarded then resumes normal playback. I have watched the same movie on another computer and it doesn't do that. What is on my system that is going wrong? I only have DivX 5.0.2 pro (adware). I used to have ffdshow, but I uninstalled it and have none of the divx advanced settings ticked or slid (slider). Has this happened to anyone else, or know of a way I can remedy this problem? thanks, chip

What are you using to watch the video? Try using media player v6.4 Mac

I've tried BSPlayer and WMP...It happens on both. chip

Does this happen only on this one video or on everyone you watch? Does it only happen when watching divx 5.02 content or on any codec? Have you tried to re-install the codec? Just a few questions. Mac