I just disabled adblock and checked the login page, and the only ad I had was the top border. I also got the same thing in IE. Steve's profile isn't showing him logging on, so I doubt he's changed it. Do you have any toolbars or anything installed? I know some of the "less reputable" toolbars will add advertisements to various web pages. They're usually the same ones that offer to sell you an adblock or spyware removal products. I'd suggest running spybot search & destroy or malwarebytes anti-malware (both free) and uninstalling any toolbars, especially ones you don't use and don't remember installing.