Multisite - reload globals

function pm_reload_globals($new_blog_id) {
  global $permalink_manager_uris, $permalink_manager_redirects, $permalink_manager_external_redirects;

    if(function_exists('get_blog_option')) {
      $permalink_manager_uris = get_blog_option($new_blog_id, 'permalink-manager-uris');
      $permalink_manager_redirects = get_blog_option($new_blog_id, 'permalink-manager-redirects');
      $permalink_manager_external_redirects = get_blog_option($new_blog_id, 'permalink-manager-external-redirects');
    }
}
add_action('switch_blog', 'pm_reload_globals', 9);