Please don't include doc/ and examples/ in the main package and create a -docs subpackage to contain these.
PyXB-1.2.3-3.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/PyXB-1.2.3-3.fc21
Package PyXB-1.2.3-3.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 PyXB-1.2.3-3.fc21' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-11225/PyXB-1.2.3-3.fc21 then log in and leave karma (feedback).
PyXB-1.2.3-3.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.