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

[alessandro]

Binary package hint: gnome-app-install

Using Ubuntu 9.04 Jaunty Jackalope, I have gnome-app-install 0.5.21-0ubuntu1 opened by "applications/add remove"
While browsing packages, I accidentally selected an application to install then chose the "cancel" key.
Few seconds later "add/remove applications" gui did not close, but apport reported the crash.
While i'm filing this bug, i can continue to browse applications.
Synaptic package manager was open during the entire above operations.

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/gnome-app-install
InterpreterPath: /usr/bin/python2.6
NonfreeKernelModules: nvidia
Package: gnome-app-install 0.5.21-0ubuntu1
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/gnome-app-install
ProcEnviron:
 LANG=it_IT.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 2.6.28-8-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare