These HDTVs are not PCs so the decoding can differ. But you can fix it most of the time by putting the video through some software to shift the audio back or forward to fix the sync issue.
So far there has never been a new firmware issue to answer such a request. Now you know.
when ever i download a film on avi file from my pc to usb memory sick the lip sinc always seems slighty out, its ok on my pc and its ok if i put it on a disc and play it through my dvd player...has anybody had this problem,or know of a fix.