Index: modules/nodereference/nodereference.module
===================================================================
--- modules/nodereference/nodereference.module	(revision 1119)
+++ modules/nodereference/nodereference.module	(working copy)
@@ -404,8 +404,8 @@
  */
 function nodereference_autocomplete_value($element, $edit = FALSE) {
   $field_key  = $element['#columns'][0];
-  if (!empty($element['#default_value'][$field_key])) {
-    $nid = $element['#default_value'][$field_key];
+  if (!empty($element['#default_value'][0][$field_key])) {
+    $nid = $element['#default_value'][0][$field_key];
     $value = db_result(db_query(db_rewrite_sql('SELECT n.title FROM {node} n WHERE n.nid = %d'), $nid));
     $value .= ' [nid:'. $nid .']';
     return array($field_key => $value);