I have... regularly.... I have it installed on my work issued laptop (I won't install it on my personal machine) and it does this OFTEN. I used chrome 99% of the time. I'm with you.. SO over Firefox.
Insane, right? Perhaps I need to just wipe it completely from my HD and reinstall? I updated to FF 11 just after writing my OP, but after yesterday I'm not feeling like starting up FF again any time soon.