PyPar2 crashed while opening a PAR2 file

Binary package hint: pypar2

While openeing a PAR2 file in nautilus PyPar2 never opened
and gave a crashreport instead.

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=8.04
DISTRIB_CODENAME=hardy
DISTRIB_DESCRIPTION="Ubuntu hardy (development branch)"
HARDY ALPHA 6

ProblemType: Crash
Architecture: i386
Date: Mon Mar 10 16:46:47 2008
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/share/pypar2/src/main.py
InterpreterPath: /usr/bin/python2.5
Package: pypar2 1.4-3
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/pypar2 /home/username/Videos/News/alt.binaries.mpeg.video.music/kaiser_chiefs-heat_dies_down-x264-2008-mv4u.mkv.par2
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=nl_NL.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/pypar2', '/home/username/Videos/News/alt.binaries.mpeg.video.music/kaiser_chiefs-heat_dies_down-x264-2008-mv4u.mkv.par2']
SourcePackage: pypar2
Title: main.py crashed with ImportError in <module>()
Uname: Linux 2.6.24-11-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin plugdev video