lsb_release crashed with ValueError in <module>()

Binary package hint: lsb

No idea - got it when system rebooted. Willing to do extra diagnostic steps if needed.

ProblemType: Crash
DistroRelease: Ubuntu 10.10
Package: lsb-release 4.0-0ubuntu8
ProcVersionSignature: Ubuntu 2.6.35-20.29-generic 2.6.35.4
Uname: Linux 2.6.35-20-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Tue Sep 14 10:13:33 2010
ExecutablePath: /usr/bin/lsb_release
InterpreterPath: /usr/bin/python2.6
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/lsb_release -sir
ProcEnviron:

PythonArgs: ['/usr/bin/lsb_release', '-sir']
SourcePackage: lsb
Title: lsb_release crashed with ValueError in <module>()
Traceback:
 Traceback (most recent call last):
   File "/usr/bin/lsb_release", line 20, in <module>
     from optparse import OptionParser
 ValueError: bad marshal data
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