unattended-upgrades not working on 9.10?

[Josef Wolf]

Hello,

I have installed the unattended-upgrades packages and configured apt to do
automatic upgrades:

   jw at raven:~ $ cat /etc/apt/apt.conf
   APT::Periodic::Enable 1;
   APT::Periodic::Update-Package-Lists 1;
   APT::Periodic::Download-Upgradeable-Packages 1;
   APT::Periodic::AutocleanInterval 1;
   APT::Periodic::Unattended-Upgrade 1;
   APT::Periodic::MaxAge 365;
   APT::Periodic::MaxSize 256;
   APT::Periodic::MinAge 60;
   DPkg::Pre-Invoke {"/bin/mount -o remount,exec /tmp; /bin/mount /boot";};
   DPkg::Post-Invoke {"/bin/mount -o remount /tmp; /bin/umount /boot";};

But I keep getting emails from apticron like:

   Date: Thu,  1 Apr 2010 10:16:21 +0200 (CEST)
   From: root <root at raven.inka.de>
   To: root at raven.inka.de
   Subject: Ubuntu package updates on tm8371.wolf.lan
   
   apticron report [Thu, 01 Apr 2010 10:16:19 +0200]
   ========================================================================
   
   apticron has detected that some packages need upgrading on:
   
           tm8371.wolf.lan
           [ 127.0.1.1 192.168.1.137 ]
   
   The following packages are currently pending an upgrade:
   
           devicekit-disks 007-2ubuntu6
           tzdata 2010g-0ubuntu0.9.10
   ========================================================================
   
   Package Details:
   [ ... ]

No automatic upgrades are done, I still have to do the upgrade manually.

Any ideas?