I've noticed that recently messages to the Ietf mailing list have been sprouting "Archived-At" headers. This seems to be a great convenience. But when I attempted to use one of these links, http://mailarchive.ietf.org/arch/msg/ietf/rvA1yLD7Ds2BAxWYv3iN1ONAxJs it turned out not to be what I expected -- it contained the message, but none of the threading that I've learned to love in IETF mail archives. Which is all rather odd, since there *is* a URL that goes to the "real" archive, and does give access to the threading: http://www.ietf.org/mail-archive/web/ietf/current/msg86465.html Why is that URL not put into the Archived-At header? Though to put the shoe on the other foot, I notice that the *former* archive will show me the full headers of the message if I want, but the latter archive won't. Dale