Now new redmine usernames login is "user@domain.com" instead of "user"

[pavelkim]

I changed redmine login to a new look. It helps avoid duplicate users "root" and "admin" etc. E.g. registering several sysadmins from several departments of University: admin@physics.university.co.uk admin@csd.university.co.uk admin@biology.university.co.uk

Now it's possible.

[s-andy]

That's also the way the old OpenID worked under Redmine. So +1 for this change.