kross-python FTBFS against ruby-1.9, see also, https://bugs.kde.org/show_bug.cgi?id=243565
kross-interpreters-4.8.0-2.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/kross-interpreters-4.8.0-2.fc17
Package kross-interpreters-4.8.0-2.fc17: * should fix your issue, * was pushed to the Fedora 17 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing kross-interpreters-4.8.0-2.fc17' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-1970/kross-interpreters-4.8.0-2.fc17 then log in and leave karma (feedback).
kross-interpreters-4.8.0-2.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.