Index: branches/5.0.x/core/units/categories/categories_event_handler.php
===================================================================
diff -u -r12231 -r12277
--- branches/5.0.x/core/units/categories/categories_event_handler.php	(.../categories_event_handler.php)	(revision 12231)
+++ branches/5.0.x/core/units/categories/categories_event_handler.php	(.../categories_event_handler.php)	(revision 12277)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: categories_event_handler.php 12231 2009-08-08 18:38:05Z alex $
+* @version	$Id: categories_event_handler.php 12277 2009-08-12 14:15:49Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -1408,6 +1408,14 @@
 		if (($object->GetDBField('ParentId') == $root_category) && ($object->GetDBField('Template') == CATEGORY_TEMPLATE_INHERIT)) {
 			$object->SetError('Template', 'no_inherit');
 		}
+
+		if (!$this->Application->IsAdmin() || !$this->Application->LoggedIn()) {
+			// only administrator can set/change "cust_RssSource" field
+
+			if ($object->GetDBField('cust_RssSource') != $object->GetOriginalField('cust_RssSource')) {
+				$object->SetError('cust_RssSource', 'not_allowed', 'la_error_NotAllowed');
+			}
+		}
 	}
 
 	/**