here ist the output from the email (had two more since from hourly run
cron job, so by far not the same every run):
/etc/cron.hourly/apt-security-updates:
debconf: unable to initialize frontend: Dialog
debconf: (TERM is not set, so the dialog frontend is not usable.)
debconf: falling back to front
This morning cron mailed me again about this debconf error about not
beeing able to set frontend, TERM not set, etc.
Unfortunatelly I've deleted the mail already. The orcward thing is
aptitude runs fine acording to my logs and installes packages from
hardy-security just fine. Last time was Jul 10
