Hi!
I just fixed the cause for the several munin-error-mails arriving at
root@xxxxxxxxxxxx. For this I replaced the "@releases"-list in
/etc/munin/plugins/apt_all from "@releases = ("stable");" with
"@releases = ("wheezy");". (Taken that from
http://www.performancemagic.com/blog/2013/01/07/the-value-stable-is-invalid-for-aptdefault-release/)
Kind regards
Dennis