Hi,
I am also receiving this email on my new SME Server 6.0.1-01. install (2 weeks old).
I also have the "*sysstat" in /etc/cron.d
with the following content
# run system activity accounting tool every 10 minutes
*/10 * * * * root /usr/lib/sa/sa1 1 1
# generate a daily summary of process accounting at 23:53
53 23 * * * root /usr/lib/sa/sa2 -A
Beast, have you worked out what it was or any clue?
Cheers
Mizou