Index: branches/unlabeled/unlabeled-1.27.2/core/admin_templates/js/catalog.js
===================================================================
diff -u -r5715 -r5716
--- branches/unlabeled/unlabeled-1.27.2/core/admin_templates/js/catalog.js	(.../catalog.js)	(revision 5715)
+++ branches/unlabeled/unlabeled-1.27.2/core/admin_templates/js/catalog.js	(.../catalog.js)	(revision 5716)
@@ -246,7 +246,7 @@
 
 // allows to get any information about tab
 Catalog.prototype.queryTabRegistry = function($search_key, $search_value, $return_key) {
-	if ($search_key == 'prefix') {
+	if ($search_key == 'prefix' && $search_value != null) {
 		// remove special here (lists with specials, but tabs have no special)
 		if ($search_value.indexOf('.') != -1) {
 			$search_value = $search_value.substring(0, $search_value.indexOf('.'));