gnome-codec-install crashes (when trying some samples)

Hello,
I want to use "gnome-codec-install" in my program, but the the command crashes after showing the dialog.

The commands:
$ gnome-codec-install 'gstreamer|0.10|manual|amr audio|encoder-audio/AMR'
and
$ gnome-codec-install 'gstreamer|0.10|totem|DivX MPEG-4 decoder|decoder-video/x-divx, divxversion=(int)4'

Both commands report:

Traceback (most recent call last):
  File "/usr/bin/gnome-codec-install", line 11, in <module>
    Main.main(sys.argv[1:])
  File "/usr/lib/python2.7/dist-packages/GnomeCodecInstall/Main.py", line 130, in main
    import MainWindow
  File "/usr/lib/python2.7/dist-packages/GnomeCodecInstall/MainWindow.py", line 14, in <module>
    import PackageWorker
  File "/usr/lib/python2.7/dist-packages/GnomeCodecInstall/PackageWorker.py", line 15, in <module>
    from aptdaemon import client, errors, enums
  File "/usr/lib/python2.7/dist-packages/aptdaemon/client.py", line 55, in <module>
    class AptTransaction(GObject.Object):
AttributeError: 'module' object has no attribute 'Object'

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: gnome-codec-install 0.4.7+nmu1ubuntu3
ProcVersionSignature: Ubuntu 3.8.0-5.10-generic 3.8.0-rc6
Uname: Linux 3.8.0-5-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.8-0ubuntu4
Architecture: i386
Date: Fri Feb 15 20:25:07 2013
InstallationDate: Installed on 2013-01-18 (28 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha i386 (20130114)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: gnome-codec-install
UpgradeStatus: No upgrade log present (probably fresh install)