Index: branches/5.2.x/core/units/user_groups/user_groups_config.php
===================================================================
diff -u -N -r15012 -r15563
--- branches/5.2.x/core/units/user_groups/user_groups_config.php	(.../user_groups_config.php)	(revision 15012)
+++ branches/5.2.x/core/units/user_groups/user_groups_config.php	(.../user_groups_config.php)	(revision 15563)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: user_groups_config.php 15012 2012-01-06 20:38:49Z alex $
+* @version	$Id: user_groups_config.php 15563 2012-10-09 16:05:41Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -37,7 +37,7 @@
 																'CalculatedFields'	=>	Array (
 																	''	=>	Array(
 																		'UserName' => 'CONCAT(u.LastName, \' \', u.FirstName)',
-																		'UserLogin' => 'u.Username',
+																		'UserLogin' => 'IF(u.Username = "", u.Email, u.Username)',
 																		'PrimaryGroup' => 'IF(u.PrimaryGroupId = %1$s.GroupId, 1, 0)',
 																	),
 																),