[otrs] pam_succeed_if: error retrieving information about user otrs

Hello, I recently uninstalled OTRS on a Fedora Core 3 machine, using rpm -e otrs. I restarted apache and also dropped the otrs database as I didn't need that anymore on that machine. After that I kept getting a lot of messages like this in my logwatch emails: crond[799]: pam_succeed_if: error retrieving information about user otrs I thought maybe the user otrs was still on the system with a crontab trying to execute OTRS tasks, so I removed the otrs user (userdel -r otrs). But I'm still getting a _lot_ of messages like the above (only the number changes, I guess that's a pid). Does anyone have any idea what's still left on this system that causes these errors? Nils Breunese.