Cannot install updates requiring untrusted packages

[mark johnson]

What happened:
I have packages from an untrusted/unauthenticated repository installed.
On Login, update manager popped up and displayed a list of available updates.
I clicked "Install Updates"
I the dialogue shown in the attachment was displayed

What I expected:
I click a button that says "That's OK, installed untrusted packages" (as you can in the CLI)
Updates are installed

What happens instead:
The only option is "close"
When "close" is clicked, no updates are installed.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.9
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
Date: Mon Aug 27 16:28:22 2012
GsettingsChanges:
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1346077771
 com.ubuntu.update-manager window-height 847
 com.ubuntu.update-manager window-width 720
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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

[Jussi Lind (jussi-lind)]

I think this is a major usability issue especially for new users.