I hypothesize it's to let multiple users have the same username if desired (e.g. through Facebook Connect or other sign in methods). Email is guaranteed to be unique, hence why services like Facebook use it.
I doubt it. Just 2 days ago I had someone register through facebook at my forum, and I see people register here with profile pictures from facebook all the time.
On a fresh install of 2.1b1, I can no longer select Facebook or Twitter as Authenticator (only see OpenID & Google). Is this an install problem or by design (in 2.1)? If design, will they be restored in an upcoming release? (specifically interested in Facebook) Thanks!
It is On, the problem is that the "entry/register" page for this theme doesn't include the Signup with Facebook/Twitter buttons. For the rest of the pages (like "entry/signin" for example) it works fine. Here: forum.viajanteanonimo.com PS: even on this forum, the Facebook connect is not working properly :(
I got around this by opening the social apps and changing the version number listed. e.g for facebook /plugins/Facebook/class.facebook.plugin.php on line 13 i changed what was there and placed in 'RequiredApplications' => array('Vanilla' => '2.2b1'), And it activated and works for me now