--- uploadify.module.orig	2011-05-25 14:25:54.000000000 +0400
+++ uploadify.module	2011-05-25 14:30:47.000000000 +0400
@@ -288,7 +288,10 @@
     module_load_include('inc', 'content', 'includes/content.node_form');
     $form_state['item_count'] = array($field_name => count($post_uploadify) + 1);
     $form_element = content_field_form($form, $form_state, $field);
-    drupal_alter('form', $form_element, array(), 'content_add_more_js');
+    $data = &$form_element;
+    $form_element_state = array();
+    $data['__drupal_alter_by_ref'] = array(&$form_element_state);
+    drupal_alter('form', $data, 'content_add_more_js');
     // My alter.
     drupal_alter($field['widget']['type'] .'_uploadify_form', $form_element, $field);