IDVD audio sync problems after Lion upgrade

Hi all,
I posted this in the Lion discussion, but thought I might have a go here as well. I'm having problems with iDVD and audio sync as follows...
I often download files from my Beyonwiz PVR, convert them to mpeg and DV files using MPEG Streamclip (with Quicktime MPEG playback component), then burn a disc with iDVD. Since upgrading to Lion, I notice that the audio in these files, and the burnt DVD in particular, can be slightly out-of-sync with the video. Although the effect is slight, I find it very unacceptable - its like trying to watch something that been badly dubbed. I find it to be a very jarring effect to watch voices and intonation out of sync with the picture.
I'm not sure where the problem lies - is it Quicktime, MPEG Streamclip, and/or iDVD ? I never had this problem at all with Snow Leopard.
Fox

I've discovered that the problem appears to be the conversion of the mpeg file to the DV file. The video/audio goes slightly out of sync using MPEG Streamclip under Mac OS Lion. I never had any problem with Snow Leopard. I'll have to try different conversion methods and see what happens...

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