This is incredibly easy to fix in Womble MPEG Video Wizard, when it's something that goes bad at commercial break (as opposed to gradual sync loss, or if it's an AVI file). In general, what has happened is the audio has drifted 1 GOP (15-18 frames), about a half second. Not a lot, but enough to be very visible drift.
TDA is guilty of sloppy editing, one reason to NEVER EDIT IN TDA. Just ask allaboutduncan about his very first version of Krypto some years ago, where his project was utterly obliterated by TDA. Markatisu's set of Aladdin has no drift issues, but his files are technically butchered by TDA and almost impossible to re-author smoothly.
Uncompressed AVI, re-sync'd in Adobe Premiere, is another method. If you need Premiere 6.5, ask. That version is very low-footprint (unlike the "CS" versions), meaning is needs less CPU and RAM to operate (512MB-1GB is fine, unlike the CS hogs that really need 2-3GB to work well). Procoder and MainConcept
both plug into Premiere as exporters from the timeline.