update-manager crashed with ImportError in <module>()

[miked]

Binary package hint: update-manager

Ubuntu 8.04 - the Hardy Heron
gnome 2.22.3

ProblemType: Crash
Architecture: i386
Date: Sun Dec 28 21:40:59 2008
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/bin/update-manager
InterpreterPath: /usr/bin/python2.5
Package: update-manager 1:0.87.30
PackageArchitecture: all
ProcCmdline: /usr/bin/python2.5 /usr/bin/update-manager
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/update-manager']
SourcePackage: update-manager
Title: update-manager crashed with ImportError in <module>()
Traceback:
 Traceback (most recent call last):
   File "/usr/bin/update-manager", line 25, in <module>
     import pygtk
 ImportError: No module named pygtk
Uname: Linux 2.6.24-23-generic i686