Index: i18nmenu_node.module
===================================================================
--- i18nmenu_node.module	(revision 3231)
+++ i18nmenu_node.module	(working copy)
@@ -239,7 +239,7 @@
  * Implementation of hook_form_alter().
  */
 function i18nmenu_node_form_alter(&$form, &$form_state, $form_id) {
-  if (isset($form['type']) && isset($form['#node']) && $form['type']['#value'] .'_node_form' == $form_id) {
+  if (isset($form['type']) && isset($form['#node']) && $form['type']['#value'] .'_node_form' == $form_id && isset($form['menu'])) {
     $node = $form['#node'];
     $translation_support = translation_supported_type($node->type);