Setting for "Notify me of new ubuntu versions" got changed automagically and silently

[Teo]

A long time ago, around the times of Ubuntu 11.04, I realised that this settings exists in Update Manager: "Notify me of a new ubuntu version", whose default value "For long-term support versions" was preventing me from being notified of new non-LTS versions. So I CHANGED IT and I set it to "For any new version".
It worked (I got upgrades for 11.04, 11.10 and 12.04) and I never touched it again.

Now I had been waiting for a few weeks for the new 12.10 version to appear as an option to upgrade, and was wondering how long it would take, until I decided to have a look to that setting, and I found out it had been changed back to "For long-term-support versions".

I guess it got changed when I upgraded to 12.04 which IIRC is a LTS version. This should never be changed automatically without prompting the user.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.11
ProcVersionSignature: Ubuntu 3.2.0-33.52-generic 3.2.31
Uname: Linux 3.2.0-33-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu15
Architecture: i386
Date: Fri Nov 16 17:09:18 2012
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: Upgraded to precise on 2012-05-17 (183 days ago)
VarLogDistupgradeAptclonesystemstate.tar.gz: Error: [Errno 13] Permission denied: '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'