<A target="_blank" href="http://www.ns-tech.com/blog/geldred.nsf/plinks/GELD-8FP264">Gregg Eldred has posted a link to a new Technote that covers three HTTP errors</A>: "Error 403 - You are forbidden to perform this operation"; "Error 404 - Item Not Found Exception"; and "Error 500 - Command Not Handled Exception".