There should be a notice that those fields are required. There was substantial feedback from another user with CB which really improved our testing of those fields, and overall integration with CB in the most recent JFBC 3.4 and 4.0 releases. However, we'll have to test with CB 1.3.1, as most of our tests lately have been with CB 1.5+ (they're on 1.7 now, I think).
I know you've sent it a zillion times, but can you also send a link to your page.. and delete any user accounts of ours (usually with an @sourcecoast.com email address)? That way, we can get to the login/register page and see what's happening.
Thanks,
Alex