Index: filefield.module
===================================================================
--- filefield.module	(revision 90)
+++ filefield.module	(working copy)
@@ -289,6 +289,7 @@
   module_load_include('inc', 'filefield', 'field_widget');
 
   $form['#attributes'] = array('enctype' => 'multipart/form-data');
+  if (empty($items[$delta])) $items[$delta] = _filefield_default_value($field);
 
   $element = array(
     '#title' => $field['widget']['label'],