gdecrypt doesn't start (glib.GError: format picture unkonown)

[Thomas]

gdecrypt doesn't start

$ gdecrypt
Traceback (most recent call last):
  File "./main.py", line 609, in <module>
    gdc = gdecrypt()
  File "./main.py", line 127, in __init__
    pixbuf128 = gtk.icon_theme_get_default().load_icon("gdecrypt",128,0)
glib.GError: Format der Bilddatei unbekannt

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gdecrypt 0.7.2.2-0ubuntu6
ProcVersionSignature: Ubuntu 3.2.0-36.57-generic 3.2.35
Uname: Linux 3.2.0-36-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
Date: Tue Jan 22 22:11:22 2013
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120423)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=
 TERM=xterm
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: gdecrypt
UpgradeStatus: No upgrade log present (probably fresh install)

[Thomas (tom-rosary)]

found same bugs here
https://lists.launchpad.net/desktop-packages/msg59288.html
http://<email address hidden>/msg3400433.html