diff -upr old/nodereferrer.module new/nodereferrer.module
--- nodereferrer.module 2009-12-28 20:07:59.000000000 +1100
+++ nodereferrer.module 2010-02-28 16:11:28.000000000 +1100
@@ -429,6 +429,9 @@ function nodereferrer_referrers($nid,  $

       while ($value = db_fetch_array($result)) {
+        //Store the nodereference fieldname in the nodereferrer data in the node,
+        //so that it can be looked up without needing to load the referring node.
+        $value['referrer'] = $fieldname;
         // avoid duplicate referrers by using nid as key
         $values[$value['nid']] = $value;
       }
     }