static function formatAmazonFeedError($feed_error)
 {
     $error_message = WPLA_FeedValidator::explainAmazonError($feed_error['error-code'], $feed_error['error-message']);
     $error_message = '<b>' . $feed_error['error-type'] . ' ' . $feed_error['error-code'] . ':</b> ' . self::convert_links($error_message);
     if (isset($feed_error['feed_id'])) {
         // get feed permalink
         $feed_id = $feed_error['feed_id'];
         $feed_permalink = admin_url('admin-ajax.php?action=wpla_feed_details') . '&id=' . $feed_id . '&sig=' . md5($feed_id . get_option('wpla_instance'));
         $error_message .= '&nbsp;<a href="' . $feed_permalink . '" title="inspect feed details" target="_blank">[&raquo]</a>';
     }
     return $error_message;
 }