Description of problem: The package should contain an appdata file. See: http://fedoraproject.org/wiki/Packaging:AppData
xpra-0.14.22-4.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/xpra-0.14.22-4.fc21
xpra-0.14.22-4.fc22 has been submitted as an update for Fedora 22. https://admin.fedoraproject.org/updates/xpra-0.14.22-4.fc22
xpra-0.14.22-4.fc20 has been submitted as an update for Fedora 20. https://admin.fedoraproject.org/updates/xpra-0.14.22-4.fc20
Package xpra-0.14.22-4.fc21: * should fix your issue, * was pushed to the Fedora 21 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing xpra-0.14.22-4.fc21' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2015-7125/xpra-0.14.22-4.fc21 then log in and leave karma (feedback).
xpra-0.14.22-4.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.