Index: modules/field_ui/field_ui.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/field_ui/field_ui.admin.inc,v
retrieving revision 1.60
diff -u -p -r1.60 field_ui.admin.inc
--- modules/field_ui/field_ui.admin.inc	10 Aug 2010 17:05:18 -0000	1.60
+++ modules/field_ui/field_ui.admin.inc	19 Aug 2010 14:54:02 -0000
@@ -817,7 +817,8 @@ function field_ui_display_overview_form(
       // We are currently editing this field's formatter settings. Display the
       // settings form and submit buttons.
       $table[$name]['settings_edit_form'] = array();
-      $additions = module_invoke($formatter['module'], 'field_formatter_settings_form', $field, $instance, $view_mode, $form, $form_state);
+      $function = $formatter['module'] . '_field_formatter_settings_form';
+      $additions = $function($field, $instance, $view_mode, $form, $form_state);
       if (is_array($additions)) {
         $table[$name]['settings_edit_form'] = array(
           '#type' => 'container',