Thanks to Tygrrz for emailing in
DivX has just been updated to 5.0.5.
Fixed:
A bug that would cause the codec to encode every frame as an I-Frame when used with certain applications (e.g., AVIUtil, DVD2AVI, and some video capture applications).
Download: Divx Pro 5.0.5 free (adware)
Download: Divx 5.0.5
News source: Divx.com