[DJShamrock]

NOT A PLUG FOR MY WEBSITE!!!!

This was really annoying but after about 3 reformats I figured it out.

I own a pretty large gaming website, used to be HL2Central.net but now it's GameCentralNetwork.net.

Our forums are pretty big.
Game Central Network Boards (Powered by Invision Power Board)

For some reason me and a bunch of others couldn't login in Firefox. After a reformat I could for awhile but then it wouldn't let me. I had to use IE to login or the IE Firefox plugin. Anyways I found the culprit.

It was the Imageshack Toolbar Extension.
ImageShack® - Tstart

Now I have used this toolbar for years without an issue. But this version is the problem. I install it, I can't logon to my website or a few others with IPB or IPB2. As soon as I install it I can.

Don't know if this helps anyone with this issue. Let my pain be your, uh, advantage.