Index: branches/RC/core/admin_templates/js/script.js
===================================================================
diff -u -r11483 -r11495
--- branches/RC/core/admin_templates/js/script.js	(.../script.js)	(revision 11483)
+++ branches/RC/core/admin_templates/js/script.js	(.../script.js)	(revision 11495)
@@ -1366,8 +1366,14 @@
 		// 1. cycle through popups to get main window
 		try {
 			// will be error, when other site is opened in parent window
+			var $i = 0;
 			while ($main_window.opener) {
+				if ($i == 10) {
+					break;
+				}
+
 				$main_window = $main_window.opener;
+				$i++;
 			}
 		}
 		catch (err) {