Actually, that won't work.
They added a twist with RD and MDK cron... they setup some directories that cron checks and runs whatever scripts are in them accordingly. For example:
/etc/cron.weekly - has scripts that run weekly
/etc/cron.monthly - has scripts that run monthly
and so on and so forth.
One of the scripts in your /etc/cron.daily directory is failing for some reason. I'm not sure what "inn-cron-expire" does. Maybe you could post the contents of that script for us.