admin/.../maintenance page show admin/.../actions help text

If the current user is not user 1, the help text on http://www.example.com/#overlay=admin/config/development/maintenance says "There are two types of actions: simple and advanced..." (see "Maintenance.png").

This is the help text of the http://www.example.com/#overlay=admin/config/system/actions page.

It's the result of a missing break in the switch statement of system_help function (system.module) :

// ...
case 'admin/config/development/maintenance':
  global $user;
  if ($user->uid == 1) {
    return '<p>' . t('If you are upgrading to a newer version...')) . '</p>';
  }
  // missing "break;" here
case 'admin/config/system/actions':
case 'admin/config/system/actions/manage':
  $output = '';
  $output .= '<p>' . t('There are two types of actions: simple and advanced....') . '</p>';
  if (module_exists('trigger')) {
    $output .= '<p>' . t('You may proceed to the <a href="@url">Triggers</a>...'))) . '</p>';
  }
  return $output;
  // ...