muon-updater fails to authorize update on KDE desktop

[Oded Arbel]

On the KDE desktop, when the notification for new software updates comes up and one clicks on the notification icons, the muon-updater interface starts. But when clicking on "Apply Changes", muon-updater pauses for a few seconds and then shows the message:
This operation cannot continue since proper authorization was not provided

At no point there was a dialog requesting any kind of authorization, so I'm not sure what's going on - but I can't get the software updated except using the terminal.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: muon-updater 1.2.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu2
Architecture: amd64
Date: Mon Oct 10 23:45:01 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110921.2)
ProcEnviron:
 LANGUAGE=
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: muon
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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