Well, I'm Pissed

I just upgraded to Mozilla Firefox 1.5, only to find that it had deleted all of the search plugins I had previously downloaded (and I had a lot of them—including one or two ones I had created myself).  To compound matters, mycroft is currently throwing mysql_connect() errors everywhere, meaning that I can't just re-download them.  Needless to say, I am not happy with this.

Anybody else have this happen to them?