Description of problem: Please enable the 'negotiate' method in curl; this can be done by adding | --with-gssapi=/usr/kerberos to %configure in the spec-file. With a small modification (changing lowercase 'http' to 'HTTP'; see http://sourceforge.net/tracker/index.php?func=detail&aid=1004105&group_id=976&atid=100976) and using bogus usernames (see http://sourceforge.net/tracker/index.php?func=detail&aid=1004841&group_id=976&atid=100976) it works well with the mod_auth_kerb package. This auth-method is supported by recent Mozilla/Firefox also. Version-Release number of selected component (if applicable): curl-7.12.0-2
The first mentioned patch is included in the just released curl 7.12.1 upstream release. The second problem is still present but documented in the KNOWN_BUGS file.