I am using the yum.conf from the Fedora FAQ site, and I copied the KDE server infro directly from their site. My config file is correct.
[andrew@localhost andrew]$ yum check-update Gathering header information file(s) from server(s) Server: ATrpms - Good (2nd Most Stable) Error - /var/cache/yum/atrpms-good/header.info cannot be found Please ask your sysadmin to update the headers on this system. [andrew@localhost andrew]$