AC3 problem

I got a DivX here with AC3 sound. Trouble is, its runs in slow motion!!!

I know its an AC3 problem, as I got the AC3 plugin and used V-Dub to convert the sound to MP3, and the thing runs normal now!

Anyone know what causes this? and a solution please.


Look up ac3filter on sourceforge, I think most recent is 0.70b.