I rendered a MainConcept mpg2 file in Vegas 6 and brought it into DVDA 3 to make a simple single movie DVD. I do this all the time, by the way, with no trouble. The mpg plays just fine in DVD 3, sync is great, but when I burn the disc sync is off from beginning to end. I have burned at all speeds and the result is the same. What's going on? Any clues?