? field_ui.admin.inc.patch
? sites/default/files
? sites/default/settings.php
Index: modules/field_ui/field_ui.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/field_ui/field_ui.admin.inc,v
retrieving revision 1.66
diff -u -p -r1.66 field_ui.admin.inc
--- modules/field_ui/field_ui.admin.inc	16 Sep 2010 20:14:49 -0000	1.66
+++ modules/field_ui/field_ui.admin.inc	16 Sep 2010 20:23:55 -0000
@@ -374,10 +374,11 @@ function field_ui_field_overview_form($f
       ),
     );
 
-    if (!empty($instance['locked'])) {
+    if ($field['locked']) {
       $table[$name]['edit'] = array('#value' => t('Locked'));
       $table[$name]['delete'] = array();
       $table[$name]['#attributes']['class'][] = 'menu-disabled';
+      $table[$name]['widget_type'] = array('#value' => t('Locked'));
     }
   }
 
@@ -1508,6 +1509,13 @@ function field_ui_widget_type_form($form
 
   drupal_set_title($instance['label']);
 
+  if (!empty($field['locked'])) {
+    $form['locked'] = array(
+      '#markup' => t('The field %field is locked and cannot be edited.', array('%field' => $instance['label'])),
+    );
+    return $form;
+  }
+
   $field_type = field_info_field_types($field['type']);
   $widget_type = field_info_widget_types($instance['widget']['type']);
   $bundles = field_info_bundles();