After installation of pam-0.99.8.1-17.fc8 all cron jobs fails with the following message: Feb 20 09:45:01 hut crond[28404]: CRON (root): failed to open PAM security session: Module is unknown vixie-cron-4.2-8.fc8 is installed.
correction, all jobs in /etc/cron.d/ are failing
*** This bug has been marked as a duplicate of 433544 ***