/etc/cron.daily/spamassassin was unhappy for some time now:


error: GPG validation failed!
The update downloaded successfully, but the GPG signature verificationfailed.
channel: GPG validation failed, channel failed

Apparently GnuPG checks for cross-certification now, hence the error message. Here is how to solve it:

wget http://spamassassin.apache.org/updates/GPG.KEY
sa-update --import GPG.KEY

Oh, and can somebody explain to me, what this sleep(1) thingy in /etc/cron.daily/spamassassin is about? What's it used for?