Index: includes/form.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/form.inc,v
retrieving revision 1.120
diff -u -F^f -r1.120 form.inc
--- includes/form.inc	16 May 2006 10:11:19 -0000	1.120
+++ includes/form.inc	17 May 2006 08:45:31 -0000
@@ -821,6 +821,7 @@ function expand_date($element) {
         $options = drupal_map_assoc(range(1900, 2050));
         break;
     }
+    $options[0] = '--';
     $parents = $element['#parents'];
     $parents[] = $type;
     $element[$type] = array(