"Your email cannot be changed while your account does not have a password. Request a password be emailed to you" (the last sentence is an hyperlink).
1. How can the user receive a password if the email is invalid?
2. If the user is changing his email address on Facebook, does it change it on the forum as well? (automatically)
3. When users register through Facebook, they don't enter any password, so why does it ask them to choose a password in the UserCP? If they do choose password, does it mean they can login both ways: through Facebook and through the regular log-in? (with their username/email and the new password)