Index: addresses/addresses_cck/addresses_cck.module
===================================================================
--- addresses/addresses_cck/addresses_cck.module	(revision 6813)
+++ addresses/addresses_cck/addresses_cck.module	(working copy)
@@ -130,6 +130,7 @@
       $form['required'] = array(
         '#type'   => 'hidden',
         '#value'  => $field['required'],
+        '#tree' => TRUE,
       );
       $form['#validate'][] = '_addresses_cck_field_validate';
       return $form;