diff -Naur cck_orig/modules/userreference/userreference.module cck_new/modules/userreference/userreference.module
--- cck_orig/modules/userreference/userreference.module	2010-06-10 18:17:06.000000000 +0200
+++ cck_new/modules/userreference/userreference.module	2010-07-22 12:12:42.000000000 +0200
@@ -14,7 +14,7 @@
   $items['userreference/autocomplete'] = array(
     'title' => 'Userreference autocomplete',
     'page callback' => 'userreference_autocomplete',
-    'access arguments' => array('access content'),
+    'access arguments' => array('access user profiles'),
     'type' => MENU_CALLBACK
   );
   return $items;