Same here. I was finally able to login via Chrome. IE just sits there after I enter my credentials. I can however do a 'forgot password' process, reset to the SAME password and login via IE. That works only for that current session and when I logout, I'm back to square one, but can repeat the forgot password process again successfully.
I am running Windows 7, installed the latest version of IE from Microsoft, deleted cache, history and cookies and any traces of past isc2.org activity, but still no resolution.