Even after following the advice here I still can't log in to log in to my stack overflow account from my copy Firefox. This is being posted using IE (yeuch).
Every time I click on Login, then Google, it takes me straight to an inappropriate google account rather than giving me the opportunity to log in to the correct google account. I've tried getting SO to send me an Account Recovery e-mail, but when I paste that in as my OPenID URL, it just does the same as if I clicked on the google button - taking me straight to the wrong account.
This all started because I logged out of Stack Overflow and the next time I tried to log in, accidentally used the wrong google userid. Now it seems to be stuck with that ID, even when I explicitly tell it to use another one.
Otherwise, nothing has changed here firewall wise, I haven't changed my coockie policy and I have cleared my SO cookies in FF, all to no avail. Trying in another borwser was the only way to get it to work.