When I joined today, I did so through the Twitter login. I initially tried to do so through Facebook login but got an error message. This was on Firefox. I just tested it again on Chrome and it seemed to work (though I did not go through with the registration process since I am already registered).
If you are using Firefox 9 then it's a Firefox bug. I've been searching it out for a while and there really is nothing I can do on the site end to fix it.
Using FF10, but it makes sense. No reason why it would work on Chrome if it was a site bug. Thought you would like to know in case you wanted to report it. Sounds like it already has been reported.
Many times by me and a few others. I didn't know it was also in Firefox 10. They are really messing up the browser.
