Because the twitter API doesn't return an email address, it's impossible to register a new user account.
Another issue is that after an unsuccessful login, navigating to the login page throws an error.
Unknown table 'bf_users'
SELECT bf_users.*, role_name FROM (bf_hybrid_auth_settings) LEFT JOIN bf_roles ON bf_roles.role_id = bf_users.role_id
After I upgraded to the latest v. of BF and CI the module stopped working. When clicking login with Facebook it simply displays this:
HybridAuth
Open Source Social Sign On PHP Library.
hybridauth.sourceforge.net/
Do you have plans to update this module in the near future?