When looking at a directory fully of random videos in either Coverflow or a Stack, I often get this pop-up:

The application Quick Look Server quit unexpectedly. The problem may have been caused by the AviImporter plug-in

(followed by a stacktrace).

It seems to be related to thumbnailing certain files. Anybody else seeing this? Or do I just have strangely-formatted avis on my drive?

EDIT: I just managed to crash Front Row too, by playing a particular video--and it died because of a problem that "may have been caused by the AviImporter plug-in"!