and the thread alluded to is This one
Note to Mudelfs: I know you're supposed to do the HTML differently when linking to a Mudcat thread, but I can't remember why or how ...When you're posting a message to Mudcat, and you're referring to another Mudcat page, you can leave off "http://www.mudcat.org" and make your link say "href=/thread.cfm?threadid=56611", which is what we tried to get people to do.
Actually, it's not important now, but back when we had alternate servers called ragtime, dharma, etc., some people would create links to "href=http://ragtime.mudcat.org" and so on. That worked OK then, but those links are all dead now (if they haven't been fixed).
–One of the JoeClones