Cron message?

["Knute Johnson" <knute@xxxxxxxxxxx>]

I just started getting the message below every morning from cron.  
Anybody know what it is or where I should go looking?

Thanks,

/etc/cron.daily/logrotate:

error: sa-update:3 unknown option 'notifyempty' -- ignoring line

-- 
Knute Johnson
Molon Labe...