I'm using Firefox 4 (on Windows 7) and have not seen the problem, so it's not as simple as just being Firefox 4. Admittedly, I do have NoScript installed - but I have boardgamegeek.com allowed.
Don't know if that information helps at all, but experience says the more information the better.
Thanks for that. I reset Noscript for BGG and now I can click a few times for it to work which I'll be fine with.
It does not seem to be a BGG issue although it is far from perfect. I suspect there is a setting or Firefox mod on my computer that is causing the issue. It still does not behave this way on any other site and I did notice it was trying to log me in on BGG when I did not ask for it several times.