It seems that /etc/arduino/ and /usr/share/arduino are unowned on rawhide.
Thanks for the report! A fixed package is building now.
arduino-1.0.1-4.fc18 has been submitted as an update for Fedora 18. https://admin.fedoraproject.org/updates/arduino-1.0.1-4.fc18
arduino-1.0.1-4.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/arduino-1.0.1-4.fc17
Package arduino-1.0.1-4.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 arduino-1.0.1-4.fc17' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2013-2638/arduino-1.0.1-4.fc17 then log in and leave karma (feedback).
arduino-1.0.1-4.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.
arduino-1.0.1-4.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.