package python-pkg-resources 0.6.24-1ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1

[df o'mahony]

happened on attempting to upgrade to Deepin software centre following ugrade to ubuntu 12.04

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: python-pkg-resources 0.6.24-1ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic i686
ApportVersion: 2.0.1-0ubuntu6
Architecture: i386
Date: Fri Apr 27 20:38:58 2012
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
PackageArchitecture: all
SourcePackage: distribute
Title: package python-pkg-resources 0.6.24-1ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to precise on 2012-04-27 (0 days ago)

[Launchpad Janitor (janitor)]

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