--- explorer.preview.js.orig	2009-07-23 16:52:12.000000000 +0200
+++ explorer.preview.js	2009-07-28 18:52:46.274391500 +0200
@@ -27,7 +27,7 @@ Drupal.behaviors.NodereferenceExplorerPr
       
       //attach change action to core widget, triggered when dialog returns a value
       //as well as using autocomplete functionality
-      $(widget).change(function(event) {
+      $(widget).blur(function() {
     	var val = $(this).val(); //current value
     	if (val != '') //placeholder while preview loads
     	  $(preview).text(Drupal.t('Preview loading, please wait...'));