The first time freeradius is installed the %post section of the spec file should run the bootstrapping code to assure initial certificates exist. Otherwise the first time the server is started it will fail due to missing certificates (this is with the default configuration).
fixed in 2.1.8-2 runs /etc/raddb/certs/bootstrap in %post if $1 == 1 (initial install) and /etc/raddb/certs/server.pem does not exist (just in case there were certs there)
freeradius-2.1.8-2.fc12 has been submitted as an update for Fedora 12. http://admin.fedoraproject.org/updates/freeradius-2.1.8-2.fc12
freeradius-2.1.8-2.fc12 has been pushed to the Fedora 12 stable repository. If problems still persist, please make note of it in this bug report.