lsb_release crashed with ImportError in <module>()

[Anand Kumria]

Binary package hint: lsb

1) 9.10

2)
anand@saltatrix:~$ apt-cache policy lsb
lsb:
  Installed: (none)
  Candidate: 4.0-0ubuntu1
  Version table:
     4.0-0ubuntu1 0
        500 http://gb.archive.ubuntu.com karmic/main Packages
     3.2-20ubuntu4 0
        500 http://gb.archive.ubuntu.com jaunty/main Packages

3)
nothing to happen

4)
the 'crash detected' dialog popped up when I least logged in.

ProblemType: Crash
Architecture: amd64
Date: Mon Jun 8 12:07:02 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/lsb_release
InterpreterPath: /usr/bin/python2.6
NonfreeKernelModules: nvidia
Package: lsb-release 4.0-0ubuntu1
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/lsb_release -sir
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.30-5.6-generic
PythonArgs: ['/usr/bin/lsb_release', '-sir']
SourcePackage: lsb
Title: lsb_release crashed with ImportError in <module>()
Traceback:
 Traceback (most recent call last):
   File "/usr/bin/lsb_release", line 26, in <module>
     import lsb_release
 ImportError: No module named lsb_release
Uname: Linux 2.6.30-5-generic x86_64
UserGroups: