Index: modules/node/node.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/node/node.module,v
retrieving revision 1.1289
diff -u -r1.1289 node.module
--- modules/node/node.module	16 Aug 2010 20:59:34 -0000	1.1289
+++ modules/node/node.module	17 Aug 2010 14:07:06 -0000
@@ -1709,7 +1709,7 @@
   foreach (element_children($form['factors']) as $key) {
     $row = array();
     $row[] = $form['factors'][$key]['#title'];
-    unset($form['factors'][$key]['#title']);
+    $form['factors'][$key]['#title_display'] = 'invisible';
     $row[] = drupal_render($form['factors'][$key]);
     $rows[] = $row;
   }