Use http://dl.atrpms.net/fc1-i386/redhat/updates-legacy and http://dl.atrpms.net/fc1-i386/redhat/updates-legacy-testing/ instead for now. I think the link above only has yum20 compatible metadata format, and yum 2.3.4 needs the so called repo-md format.
I've been looking for such a repository for FC2 so that I can use mach with yum. What is the directory http://dl.atrpms.net/fc2-i386/redhat/updates for? Are those official Fedora updates to the packages in http://dl.atrpms.net/fc2-i386/redhat/release? If so, what is http://dl.atrpms.net/fc2-i386/redhat/updates-testing for? If not, where are the official Fedora updates? Do you mirror them?
Thanks, John Dalbec