We use IE 8 (ugh!!!) corporately where I work(hence... no choice)
But IE8 sucks and a lot of sites don't work with it now.
I installed Firefox and use it for all 'non-corporate' web access. (I have latest 23.0.1 version)
Suddenly SQLSERVERCENTRAL.com does not let me login when I am using FireFox.
I go to the login screen and type my email and password and it processes it but I am still not logged in.
(the screen still shows the 'Log in:' option and it says 'Not Logged In' in the banner)
If I type in an incorrect password it tells me it's a bad password. (So it seems to be understanding my correct password)
I have cleared the firefox cache, stopped and restarted the machine.
On the same machine I can login into SQLServerCentral with IE8. (ugh!.. but a least a work around)
(also IE8 remembers my login and I am automatically connected)