oneconf-service crashed with ImportError in /usr/lib/python2.7/dist-packages/oneconf/packagesethandler.py: No module named distributor

Had just finished running update-manager and I got a crash report dialogue.

Description: Ubuntu precise (development branch)
Release: 12.04

oneconf:
  Installed: 0.2.6.8ubuntu1
  Candidate: 0.2.6.8ubuntu1
  Version table:
 *** 0.2.6.8ubuntu1 0
        500 http://gb.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: oneconf 0.2.6.8ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic 3.2.6
Uname: Linux 3.2.0-16-generic x86_64
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
Date: Sat Feb 18 14:20:51 2012
DuplicateOf: https://bugs.launchpad.net/bugs/934636
ExecutablePath: /usr/share/oneconf/oneconf-service
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120208)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/share/oneconf/oneconf-service
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
PythonArgs: ['/usr/share/oneconf/oneconf-service']
SourcePackage: oneconf
Title: oneconf-service crashed with ImportError in /usr/lib/python2.7/dist-packages/oneconf/packagesethandler.py: No module named distributor
UpgradeStatus: Upgraded to precise on 2012-02-11 (6 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo