gnome-app-install crashed with ValueError in _refilter()

[Herbert Post]

Binary package hint: gnome-app-install

Description: Ubuntu jaunty (development branch)
Release: 9.04

gnome-app-install:
  Geïnstalleerd: 0.5.24-0ubuntu1
  Kandidaat: 0.5.24-0ubuntu1
  Versietabel:
 *** 0.5.24-0ubuntu1 0
        500 http://nl.archive.ubuntu.com jaunty/main Packages
        100 /var/lib/dpkg/status

I was switching from Audio group to the Education group.
It was showing the apps in the Audio group but failed to show any in the Education group.
Next the error came.

ProblemType: Crash
Architecture: amd64
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/gnome-app-install
InterpreterPath: /usr/bin/python2.6
NonfreeKernelModules: nvidia
Package: gnome-app-install 0.5.24-0ubuntu1
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/gnome-app-install
ProcEnviron:
 LANG=nl_NL.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/gnome-app-install']
SourcePackage: gnome-app-install
Title: gnome-app-install crashed with ValueError in _refilter()
Uname: Linux 2.6.28-11-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare