Please review /etc/httpd/conf.d/webalizer.conf
http://pkgs.fedoraproject.org/cgit/webalizer.git/diff/?id=b2f08d730fa5dc900cee1edbfc66f58b172524ea
webalizer-2.23_05-6.fc18 has been submitted as an update for Fedora 18. https://admin.fedoraproject.org/updates/webalizer-2.23_05-6.fc18
Package webalizer-2.23_05-6.fc18: * should fix your issue, * was pushed to the Fedora 18 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing webalizer-2.23_05-6.fc18' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2013-0366/webalizer-2.23_05-6.fc18 then log in and leave karma (feedback).
webalizer-2.23_05-6.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.