events+ - submit button does nothing for new registrants

Hi, I've got another bug with the events + where a new user tries to register for the event, the submit button doesn't work for WP users / Facebook users.

I'm using the same vanilla install of WP 3.5.1. with the twenty twelve theme. and latest version of events +.

https://premium.wpmudev.org/forums/topic/event-overrid-archive-template-default-showing-no-events-found#post-376125

You can test it yourself by trying to register against this event:
http://events.xodmedia.com/events/2013/04/event-2-test/