404. That’s an error.
The requested URL /add?feedurl=http://www.randomhouse.com/catalog/rss.pperl?cat_id_ex=House+and+Home:3951&cat_id_ex=Gardening:3803 was not found on this server. That’s all we know.
/add?feedurl=http://www.randomhouse.com/catalog/rss.pperl?cat_id_ex=House+and+Home:3951&cat_id_ex=Gardening:3803