Apache, Directory browsing and Rendezvous

I'm running a web server using a Mac OS X 10.2.8 Client. Files are served out of the system web folder (Library/WebServer/Documents) and I have disabled directory browsing in httpd.conf. The servers Rendezvous name is "webserver". The server is furthermore behind a router with port 80 forwarded to the server's LAN IP. Now if send someone an URL (in, say, an email) that is formatted like this: http://www.mydomain.com/folder and that person follows that link they are likely to receive an error message saying something like "The page could not be displayed because webserver.local could not be found". (An index.html file is available in the folder directory), If the URL had been formatted as www.mydomain.com/folder/ or www.mydomain.com/folder/index.html everything had worked fine. I figure this is something Rendezvous does to my server. If your try to go to any other server with that link the extra / will be added and everything works fine. I've tried to diable mod_rendezvous in httpd.conf but this didn't work. Anyone have any ideas what is wrong and how I can fix it? Many thanks in advance!