cron.daily, howto control mailed reports

[Joao Clemente <jpcl@rnl.ist.utl.pt>]

Hi people.
In a server I setup recently I tougth of keeping the clock sinc'ed by 
running ntpdate daily. I wrote a script calling
/etc/init.d/ntpdate restart
and I placed it in /etc/cron.daily.

Why do I receive daily reports (in my mail system) from this particular 
script being runned, but not from other also existant in /etc/cron.daily?

Ps: I just notisted an report from another script that I'm running 
hourly.. but it seems to have only reported 1 time, when there was an 
output to stdout... can that be it? If there is something in stdout cron 
will report to the mail system, otherwise it will run silently?

Thanks
Joao Clemente