Index: modules/node/node.js
===================================================================
RCS file: /cvs/drupal/drupal/modules/node/node.js,v
retrieving revision 1.4
diff -u -p -r1.4 node.js
--- modules/node/node.js	27 Apr 2009 20:19:37 -0000	1.4
+++ modules/node/node.js	29 Aug 2009 15:21:38 -0000
@@ -13,6 +13,9 @@ Drupal.behaviors.nodeFieldsetSummaries =
     $('fieldset#edit-author', context).setSummary(function (context) {
       var name = $('#edit-name').val(), date = $('#edit-date').val();
       return date ?
+      var name = $('#edit-name').val() || Drupal.t('Anonymous'),
+          date = $('#edit-date').val();
+      return Date.parse(date.replace(/(\d)-(\d)/g, '$1/$2')) ?
         Drupal.t('By @name on @date', { '@name': name, '@date': date }) :
         Drupal.t('By @name', { '@name': name });
     });