BuddyPress.org

Before I chime in, when we run our unit tests with users; we:

• When testing an upgrade, I always delete a test user of mine: qauser
• sql delete, and php register the user again after the upgrade.
• I leave one user, qaeditor around. This user stays with the upgrade.
• Allows me to know if perms were set across apps, if new users are good to go, and if old users are ok.
• We flip roles too, but thats another test.

Anyways, Camel Case not supported for login.

Lowercase was put in back in 05.09 https://trac.mu.wordpress.org/changeset/1770

In trunk here is the snipit:

571	function _fill_user( &$user ) {

572	    global $wpdb;

573

574	    // WPMU uses lowercase logins

575	    $user->user_login = strtolower( $user->user_login );