Dunno if it's been reported, but while being a n00b on this forum, I'd better make use of the privileges before they end( and help out TechJa while I'm at it).....
I'm using firefox 0.9.2 and sometimes when trying to go to another page in a thread, I get a window coming up to save a particular page. It's happened twice so far (first I'm logging in since the forum upgrade).