kpackagekit crashes attempting an update

Binary package hint: kpackagekit

This is what i get when i run it from the command line.

 kpackagekit
Error, cannot create transaction proxy
enumFromString ( Group ) : converted "unknown" to "UnknownGroup" , enum value 34
angel@gbmac:~$ QDBusConnection: name 'org.freedesktop.PackageKit' had owner '' but we thought it was ':1.51'
removing transaction from pool : "/179_eabaadba_data"
removing transaction from pool : "/180_abceacde_data"
removing transaction from pool : "/181_ceecadea_data"
enumFromString ( State ) : converted "" to "UnknownState" , enum value 18
removing transaction from pool : "/182_beeabeae_data"

and apt-get update returns no updates, and a lot of packages held back

 lsb_release -rd
Description: Ubuntu 9.10
Release: 9.10

ProblemType: Bug
Architecture: i386
Date: Mon Apr 12 21:46:13 2010
DistroRelease: Ubuntu 9.10
InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Package: kpackagekit 0.4.2-0ubuntu3
ProcEnviron:
 LANGUAGE=
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-20.58-generic
SourcePackage: kpackagekit
Uname: Linux 2.6.31-20-generic i686