On an XviD file I've had some odd problems. Every time I scan the file for bad frames I get a different result. Onetime it had 1226 bad frames and over 56000 undecodable, just now when I scanned it there were only 12 bad frames. Whats the deal?

Also, normal Virtualdub can scan the file fine, but the mp3-freeze version crashes when it hits the bad frames

Are these real bad frames that need deleting, or is something else causing the problem?