--- uc_cart.module (saved version)
+++ (current document)
@@ -1208,9 +1208,7 @@
 
   $output .= '<div id="cart-form-buttons"><div id="cart-button-shopping">'
            . $continue_shopping_link .'</div>'
-           . drupal_render($form['order_id']) . drupal_render($form['form_id'])
-           . drupal_render($form['form_token']) . drupal_render($form['update'])
-           . drupal_render($form['checkout']) .'</div>';
+           . drupal_render($form) .'</div>';
 
   return $output;
 }