Posted 03 September 2010 - 12:21 AM
You can do a system restore to try and see if it would fix it. Quicktime is bothersome, I wouldn't have it installed if itunes didn't require it.
I don't what exactly would have caused it. The thing I think would be most likely is Vista sets a quota on thumbnail sizes that it saves, and then won't make new thumbnails because the reserved space is full.
Q6600, 4GB g-skill, 8800GT, P5N-D motherboard