Index: branches/RC/core/units/admin/admin_tag_processor.php
===================================================================
diff -u -N -r11214 -r11303
--- branches/RC/core/units/admin/admin_tag_processor.php	(.../admin_tag_processor.php)	(revision 11214)
+++ branches/RC/core/units/admin/admin_tag_processor.php	(.../admin_tag_processor.php)	(revision 11303)
@@ -157,7 +157,12 @@
 			/* @var $sections_helper kSectionsHelper */
 
 			$section_data =& $sections_helper->getSectionData($section);
+			if (!$section_data) {
+				trigger_error('Use of undefined section "<strong>' . $section . '</strong>" in "<strong>' . __METHOD__ . '</strong>"', E_USER_ERROR);
+				return '';
+			}
 
+
 			if (isset($params['parent']) && $params['parent']) {
 				do {
 					$section_data =& $sections_helper->getSectionData($section_data['parent']);