Distribution upgrade from 12.10 to 13.04

[Peter Nunn]

Upgrade from 12.04 to 12.10 worked (I think, its running anyway) but upgrade on this system to 13.04 has failed. Another system worked without problem.

Possibly related to having Kubuntu installed on this box?

Peter.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ubuntu-release-upgrader-core 1:0.190.6
ProcVersionSignature: Ubuntu 3.5.0-32.53-generic 3.5.7.11
Uname: Linux 3.5.0-32-generic x86_64
ApportVersion: 2.6.1-0ubuntu11
Architecture: amd64
Date: Fri Jun 14 11:15:10 2013
InstallationDate: Installed on 2011-03-10 (827 days ago)
InstallationMedia: Ubuntu-Server 10.04 LTS "Lucid Lynx" - Release amd64 (20100427)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 LC_CTYPE=en_AU.UTF-8
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_AU.UTF-8
 SHELL=/bin/zsh
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to quantal on 2013-06-14 (0 days ago)