virtaal crashed with TypeError in on_transfer(): window must be a GdkWindow

[Daniel Winzen]

Virtaal crashed while pressing Alt+Arrow down.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: virtaal 0.7.0-2
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
ApportVersion: 2.0.1-0ubuntu3
Architecture: amd64
CrashCounter: 1
Date: Mon Apr 16 20:47:20 2012
ExecutablePath: /usr/bin/virtaal
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120403)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/virtaal /home/username/Downloads/launchpad-export/orca/orca-help.master-de.po
ProcEnviron:
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/virtaal', '/home/username/Downloads/launchpad-export/orca/orca-help.master-de.po']
SourcePackage: virtaal
Title: virtaal crashed with TypeError in on_transfer(): window must be a GdkWindow
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/python2.7/dist-packages/virtaal/views/unitview.py", line 144, in on_transfer
     ev.window = self.targets[self.focused_target_n].get_window(gtk.TEXT_WINDOW_WIDGET)
 TypeError: window must be a GdkWindow
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo