Been looking over the stuff I've done to the NAS since I set it up to work with my CCTV camera.
9th December, I enabled CRON to run, when it wasn't even started, so I could manually archive my CCTV images.
http://www.matt1206.co.uk/forum/index.php/topic,38.0.html
It looks like this is a sym link back to /etc/init.d/cron
lrwxrwxrwx 1 root root 14 Aug 27 2010 S89cron -> ../init.d/cron
However, I think this may be the problem with the NAS.
I've stopped cron from running
root@nas:/# /etc/init.d/cron stop
Running file /etc/init.d/cron
Stopping periodic command scheduler: crond.
root@nas:/#
I've also deleted the S89cron file to stop it from starting on bootup
root@nas:/etc/rc2.d# ls
README S12dbus S20postfix S23ntp S50samba S59hostnamed S89cron S99rc.local S99stop-bootlogd
S10rsyslog S14avahi-daemon S20smartmontools S41netplugd S50sshd S60executord S99cups S99rmnologin
root@nas:/etc/rc2.d# rm S89cron
root@nas:/etc/rc2.d#
Will see how it goes!