Description of problem: We don't build mtr directly from upstream tarball, because there were binary blobs shipped in it. We regenerated new xz tarball and used it instead. This is no longer necessary because upstream regenerated tarball for 0.85 release.
mtr-0.85-4.fc20 has been submitted as an update for Fedora 20. https://admin.fedoraproject.org/updates/mtr-0.85-4.fc20
Package mtr-0.85-4.fc20: * should fix your issue, * was pushed to the Fedora 20 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing mtr-0.85-4.fc20' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2013-19421/mtr-0.85-4.fc20 then log in and leave karma (feedback).
mtr-0.85-4.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.