firefox update creates instability?

I was wondering if anyone else is having this problem. It is occuring between
two computers: one running Ubuntu 32-bit and one running Ubuntu 64-bit. Yesterday, while running Ubuntu 64-bit, firefox was causing all sorts of problems including lock-ups while running shockwave, error messages when opening new windows or going to webpages and locking up the entire system. Today, when I got on my Ubuntu 32-bit at work, it is starting to do the same thing. It is only recently, so I thought it may be an update.

Anyone else having problems?

edit: I should mention that I was running Pandora when it happened.