I've been using my computer as a PVR, but when I go to watch the files on the XBox, the audio and video go out of sync. It will be good for a few seconds then it will slowly de-sync. I've been recording in .wmv format. It doesn't seem to be a problem with all of my videos. I would just record in divx, but the program I'm using just crashes half the time when I try that.

I've been using XBMC since it came out and have been able to troubleshoot (with the help of these forums) everything else that I've run into. Anybody have any ideas?

Just a little bit of extra info:
When I'm playing the video and skip forward/back, the video and audio will sometimes sync temporarily, but it will quickly go out again. I know it's not the files themselves, because they play fine on the computer. If there's any extra info that would make troubleshooting easier, let me know. Thanks for any help you can give.