Index: /controller/wpsg_OrderController.class.php
===================================================================
--- /controller/wpsg_OrderController.class.php	(revision 7874)
+++ /controller/wpsg_OrderController.class.php	(revision 7875)
@@ -152,5 +152,5 @@
 
                 // ID:3 / Max Mustermann (buyer@maennchen1.de)
-                preg_match_all('/^ID:(\d+?)/i', $_REQUEST['search_customer'], $m);
+                preg_match_all('/^ID:(\d+)?/i', $_REQUEST['search_customer'], $m);
                 
                 if (wpsg_isSizedInt($m[1][0])) {