Username Rrror on Facebook Registration

Having troubles registering with Facebook. I am assuming that the site is requesting a username from Facebook but according to their API v2.0, usernames are no longer supported.

I have been trying to figure this out with little luck and I am under the impression that Joomla requires a username regardless. I tried turning on the 'use email as username' function which did not help.

Any support would be helpful.

Thanks!