gnome-app-install crashed with AttributeError in modifyUserInterface()

Binary package hint: gnome-app-install

~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=8.04
DISTRIB_CODENAME=hardy
DISTRIB_DESCRIPTION="Ubuntu hardy (development branch)"

~$ dpkg -l gnome-app-install | cat
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-f/Unpacked/Failed-cfg/Half-inst/t-aWait/T-pend
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Description
+++-=========================================-==========================================-============================================
ii gnome-app-install 0.5.2-0ubuntu1 GNOME Application Installer

When the machine tried to play .rmvb file in Movie Player, a codec search window poped up. But, it suddenly crashed without downloading the codec.

ProblemType: Crash
Architecture: i386
Date: Mon Feb 11 14:15:48 2008
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/bin/gnome-app-install
InterpreterPath: /usr/bin/python2.5
Package: gnome-app-install 0.5.2-0ubuntu1
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/gnome-codec-install --transient-for=75497475 gstreamer|0.10|totem|RealVideo\ 4.0\ decoder|decoder-video/x-pn-realvideo,\ rmversion=(int)4,\ format=(int)1073774592,\ subformat=(int)17305632
ProcCwd: /home/ahf
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/gnome-codec-install', '--transient-for=75497475', 'gstreamer|0.10|totem|RealVideo 4.0 decoder|decoder-video/x-pn-realvideo, rmversion=(int)4, format=(int)1073774592, subformat=(int)17305632']
SourcePackage: gnome-app-install
Title: gnome-app-install crashed with AttributeError in modifyUserInterface()
Uname: Linux azure 2.6.24-7-generic #1 SMP Thu Feb 7 01:29:58 UTC 2008 i686 GNU/Linux
UserGroups: adm admin audio cdrom dialout dip floppy lpadmin netdev plugdev scanner video