KpackageKit fails with "unknown error - please report a bug"

[Bill Hayes]

I always apply updates as they come in. Suddenly there are 94 updates available. When I try to apply I get:

Unknown error - KpackageKit
Unknown error, please report a bug.
More information is available in the detailed report.

Clicking the details tab does nothing except change ">>>" to "<<<".

Same thing happens when I try to install or uninstall any package.

Upgrading to oneiric is not a solution, I've tried it earlier and it bricks the system.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: konqueror 4:4.6.5-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-12.51-generic 2.6.38.8
Uname: Linux 2.6.38-12-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Mon Nov 28 10:53:49 2011
InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427)
ProcEnviron:
 LANGUAGE=en_CA:en
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: kdebase
UpgradeStatus: No upgrade log present (probably fresh install)

[quazgar (quazgar)]

I just had the same problem (also KPackageKit on 11.04), the only workaround I could find was to do a "sudo apt-get upgrade" on the terminal, to get at least the necessary updates done.