--- ./modules/node/node.module	2010-05-14 06:37:53.000000000 +0200
+++ ./modules/node/node.module	2010-05-16 01:01:41.000000000 +0200
@@ -3290,6 +3290,7 @@ function _node_access_rebuild_batch_fini
 function node_content_form($node, $form_state) {
   // It is impossible to define a content type without implementing hook_form()
   // @todo: remove this requirement.
+  $form = array();
   $type = node_type_get_type($node);
 
   if ($type->has_title) {