if you attempt to log in {being unsure whether you have registered yet}, and it fails, the register button redirects you to 'You must log in with your CMS password in order to view the draft or archived content. ' with no hope of registering unless you clear your browser session {cookies?}.
navigating directly to http://beta.stepmania.com/ForumMemberProfile/register does the same thing.
navigating directly to http://beta.stepmania.com/ForumMemberProfile/register does the same thing.