Hmmm... I don't know. (Nor could -anyone- given the lack of system history.)
Have you, perhaps, installed any new software betwixt the time Picassa
worked and when it didn't? OS patches? App patches? No visits to
http.wewillscrewyerboxupBAD.com?
Uh... your OS is Vista, right? (Sorry, but have to ask the obvious...
there are posts in this NG from folks who -don't- use Vista.)