Updated judge.inc.php and volunteer.inc.php - they were previously putting the complete status for a role into the user object as a separate value (eg. $user['judge_status'] = 'complete';). Updated that to put it in the user's role list directly (eg. $user['roles']['judge']['status'] = 'complete').
Updated register_participants_namecheck.php to use the user table and check the session against the normal user_auth_required.