Index: branches/5.1.x/core/units/languages/languages_item.php
===================================================================
diff -u -N -r14124 -r14127
--- branches/5.1.x/core/units/languages/languages_item.php	(.../languages_item.php)	(revision 14124)
+++ branches/5.1.x/core/units/languages/languages_item.php	(.../languages_item.php)	(revision 14127)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: languages_item.php 14124 2011-01-09 14:23:50Z alex $
+* @version	$Id: languages_item.php 14127 2011-01-09 14:30:14Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -54,6 +54,10 @@
 			$this->SetDBField($primary_field, 1);
 			$this->SetDBField('Enabled', 1);
 
+			// increment serial by hand, since no Update method is called
+			$this->Application->incrementCacheSerial($this->Prefix);
+			$this->Application->incrementCacheSerial($this->Prefix, $this->GetID());
+
 			return $prev_primary;
 		}