[Aemstel]

I can sum up what you said much easier than all of that, option 4 works because you turned off the thing that has a problem, which is sync playback to display, but without sync playback to display, you will drop or repeat frames, so it may seem smooth and audio will stay in sync, but you will drop frames which is noticable and once you notice it, you can't really unnotice it.

I still think this has nothing to do with the refresh rate, if people are fixing it by not having it select refresh rate, the only thing that can be happening is they are watching their movies at 60 hz instead of 24hz, audio should be fine then, but of course you will have jitter the whole time. some people won't notice that either.

Yes ok, but the thing is that I actually AM playing at 24hz, without the xbmc auto adjust, since I set my display to 1920x1080 24hz in nvidia display settings. If I do this, then 24p content plays in sync. But if I set my display to 60hz and let XBMC switch the refresh rate when playing 24p content, then it does not play in sync. And you're also right about the jitter. That's almost as bad as the desynced audio. Both make it unwatchable to me.