Lagarith:

This is how some parts of the video files look like both on playback in any mediaplayer and in the editing software. It only happens to a few frames but is very noticable.

I'm getting this error when I try to convert the files with virtualdub/mod.
When trying to render the files (edited or unedited), Vegas crashes once it hits the "infected" frames (only when rendering, not while playback)
Huffyuv:

I just cannot get the huffy files into the software anymore. Playback and converting doesn't cause any error at all.
Tried re-installing both codecs which didn't help at all.