Update Manager will not start if any repository failed to download

[Kived]

In 12.10, Update Manager now shows a dialog while automatically checking for updates. However, if any repository in your sources.list(.d) is invalid, Update Manager will not continue. This is obviously not the functionality desired by a user, who still wants to update packages even if one source is bad. If a third-party repository or PPA is taken down, that should not stop the entire system from updating.

In my case, the failing repo is my own. As I just upgraded my workstation yesterday, I have not yet set up a quantal build environment on our build server and fully expected the repo failure. I did not expect that failure to break Update Manager.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: update-manager 1:0.174.3
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Uname: Linux 3.5.0-18-generic x86_64
ApportVersion: 2.6.1-0ubuntu4
Architecture: amd64
Date: Wed Oct 24 09:35:17 2012
GsettingsChanges:
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'launch-time' b'1351089295'
 b'com.ubuntu.update-manager' b'window-height' b'600'
 b'com.ubuntu.update-manager' b'window-width' b'600'
InstallationMedia: Ubuntu-Server 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: Upgraded to quantal on 2012-10-23 (0 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.