session-installer crashed with TypeError in _render_warning(): could not convert argument to correct param type

Binary package hint: sessioninstaller

archive manager cannot handle rar extension. on trying to install rar as archive manager plugin the process is aborted as untrusted software is to be installed.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: sessioninstaller 0.20+bzr117-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-1.28-generic 2.6.38-rc2
Uname: Linux 2.6.38-1-generic x86_64
Architecture: amd64
Date: Sun Feb 6 10:56:39 2011
ExecutablePath: /usr/bin/session-installer
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/session-installer
ProcEnviron:
 SHELL=/bin/bash
 LC_MESSAGES=de_AT.utf8
 LANGUAGE=de_AT:de:en_GB:en
 LANG=de_AT.UTF-8
PythonArgs: ['/usr/bin/session-installer']
SourcePackage: sessioninstaller
Title: session-installer crashed with TypeError in _render_warning(): could not convert argument to correct param type
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/pymodules/python2.7/sessioninstaller/core.py", line 392, in _render_warning
     renderer.props.stock_id = 0
 TypeError: could not convert argument to correct param type
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare