Guys,

I've just finished editing a music video on premiere pro cc and when I watch it in the timeline the audio sync is perfect but when I export the video there's a lot of parts where the audio is out of sync with the video. The strangest thing is that if I import the file I've exported into the timeline back again it' synced! I've tried exporting H.264 (my standard preset), mpeg4, mpeg2 but the error remains. I've tried exporting the audio and the video separately and the exporting both from a different project...but nothing works.

Could this maybe have something to do with the fact that the footage is 23.98? Maybe the audio is running on different fps (I'm sure this even exists)

Any advise?

If you imported the export file and its in sync. The file is correct.
Might want to use a different playback device such as VLC.

Tried VLC, Media Player Classic and Windows Media players...out of sync in all of them.