I created a new site and am trying to test the Register functionality. But when I click the Register link, it returns 'Sorry, invalid invitation code.'. This seems to be coming from action/register.php line 99 after it checks to see if $this->code is not empty. When I first started testing the site I sent an invitation and then used it to register. But after this, I'm logged out, not coming in via invitation, and yet it still thinks there is an invitation there. This seems to be a bug. And ideas? Thanks!