Index: branches/unlabeled/unlabeled-1.2.2/core/admin_templates/js/script.js
===================================================================
diff -u -r7428 -r7472
--- branches/unlabeled/unlabeled-1.2.2/core/admin_templates/js/script.js	(.../script.js)	(revision 7428)
+++ branches/unlabeled/unlabeled-1.2.2/core/admin_templates/js/script.js	(.../script.js)	(revision 7472)
@@ -438,6 +438,7 @@
 
 	var $prev_opener = opener_action('p');
 	event_bak = get_hidden_field('events[' + $prefix_special + ']')
+	if (!event_bak) event_bak = '';
 	submit_event($prefix_special, $event, $t);
 	opener_action($prev_opener); // restore opener in parent window
 	set_hidden_field('events[' + $prefix_special + ']', event_bak); // restore event