Index: misc/drupal.js
===================================================================
RCS file: /cvs/drupal/drupal/misc/drupal.js,v
retrieving revision 1.69
diff -u -p -r1.69 drupal.js
--- misc/drupal.js	28 Jul 2010 01:38:28 -0000	1.69
+++ misc/drupal.js	31 Aug 2010 15:52:45 -0000
@@ -322,7 +322,7 @@ Drupal.ajaxError = function (xmlhttp, ur
   readyStateText = xmlhttp.status == 0 ? ("\n" + Drupal.t("ReadyState: !readyState", {'!readyState': xmlhttp.readyState})) : "";
 
   message = statusCode + pathText + statusText + responseText + readyStateText;
-  return message;
+  return '<pre>' + message + '</pre>';
 };
 
 // Class indicating that JS is enabled; used for styling purpose.