Index: branches/5.3.x/units/private_messages/private_messages_config.php
===================================================================
diff -u -N -r15655 -r15670
--- branches/5.3.x/units/private_messages/private_messages_config.php	(.../private_messages_config.php)	(revision 15655)
+++ branches/5.3.x/units/private_messages/private_messages_config.php	(.../private_messages_config.php)	(revision 15670)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: private_messages_config.php 15655 2013-01-02 17:24:32Z alex $
+* @version	$Id: private_messages_config.php 15670 2013-01-17 08:35:40Z alex $
 * @package	In-Bulletin
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -68,8 +68,8 @@
 			'Body' => 'pmb.Body',
 			'Options' => 'pmb.Options',
 
-			'FromName' => 'IF (ISNULL(from_user.Username), IF (%1$s.FromId = ' . USER_ROOT . ', "root", IF (%1$s.FromId = ' . USER_GUEST . ', "Guest", "n/a")), from_user.Username)',
-			'ToName' => 'IF (ISNULL(to_user.Username), IF (%1$s.ToId = ' . USER_ROOT . ', "root", IF (%1$s.ToId = ' . USER_GUEST . ', "Guest", "n/a")), to_user.Username)',
+			'FromName' => 'IF (ISNULL(from_user.Username), IF (%1$s.FromId = ' . USER_ROOT . ', "root", IF (%1$s.FromId = ' . USER_GUEST . ', "Guest", "n/a")), IF(from_user.Username = "", from_user.Email, from_user.Username))',
+			'ToName' => 'IF (ISNULL(to_user.Username), IF (%1$s.ToId = ' . USER_ROOT . ', "root", IF (%1$s.ToId = ' . USER_GUEST . ', "Guest", "n/a")), IF(to_user.Username = "", to_user.Email, to_user.Username))',
 
 			'FromFullName' => 'TRIM(CONCAT(from_user.FirstName, " ", from_user.LastName))',
 			'ToFullName' => 'TRIM(CONCAT(to_user.FirstName, " ", to_user.LastName))',
@@ -78,8 +78,8 @@
 
 	'Fields' => Array (
 		'PmId' => Array ('type' => 'int', 'not_null' => 1, 'default' => 0),
-		'FromId' => Array ('type' => 'int', 'formatter' => 'kLEFTFormatter', 'error_msgs' => Array ('invalid_option' => '!lu_error_UserNotFound!'), 'left_sql' => 'SELECT %s FROM '.TABLE_PREFIX.'Users WHERE `%s` = \'%s\'', 'left_key_field' => 'PortalUserId', 'left_title_field' => 'Username', 'required' => 1, 'default' => null),
-		'ToId' => Array ('type' => 'int', 'formatter' => 'kLEFTFormatter', 'error_msgs' => Array ('invalid_option' => '!lu_error_UserNotFound!'), 'left_sql' => 'SELECT %s FROM '.TABLE_PREFIX.'Users WHERE `%s` = \'%s\'', 'left_key_field' => 'PortalUserId', 'left_title_field' => 'Username', 'required' => 1, 'default' => null),
+		'FromId' => Array ('type' => 'int', 'formatter' => 'kLEFTFormatter', 'error_msgs' => Array ('invalid_option' => '!lu_error_UserNotFound!'), 'left_sql' => 'SELECT %s FROM '.TABLE_PREFIX.'Users WHERE %s', 'left_key_field' => 'PortalUserId', 'left_title_field' => USER_TITLE_FIELD, 'required' => 1, 'default' => null),
+		'ToId' => Array ('type' => 'int', 'formatter' => 'kLEFTFormatter', 'error_msgs' => Array ('invalid_option' => '!lu_error_UserNotFound!'), 'left_sql' => 'SELECT %s FROM '.TABLE_PREFIX.'Users WHERE %s', 'left_key_field' => 'PortalUserId', 'left_title_field' => USER_TITLE_FIELD, 'required' => 1, 'default' => null),
 		'FolderId' => Array ('type' => 'int', 'formatter' => 'kOptionsFormatter', 'options' => Array (0 => 'lu_Inbox', 1 => 'lu_Sent'), 'use_phrases' => 1, 'not_null' => 1, 'default' => PM_FOLDER_SENT),
 		'Status' => Array ('type' => 'int', 'formatter' => 'kOptionsFormatter', 'options' => Array (0 => 'lu_opt_MessageUnread', 1 => 'lu_opt_MessageViewed', 2 => 'lu_opt_MessageRead', 3 => 'lu_opt_MessageReplied', 4 => 'lu_opt_MessageSent'), 'use_phrases' => 1, 'not_null' => 1, 'default' => 0),
 		'PMBodyId' => Array ('type' => 'int', 'not_null' => 1, 'default' => 0),