
I was getting so frustrated. I thought it might have been due to Norton 2007 being installed, but it wasn't related (i uninstalled the bloated Norton anyways). So i tried running FF in safe mode (that is FF safe mode, not windows safe mode). Low and behold, it ran just fine. Using my supreme powers of deduction (i remembered the last addon installed was skype), i uninstalled the skype addon. After that, i re-opened FF and it ran as happy as a elephant in a peanut factory. w00t!
I hope that this will help anyone that has probs with FF in Vista...just remember to check your addons (oh, and run the latest FF version).
Just my

-Christopholofigus