LibreOffice greeting screen distorted

[XiFu]

When opening the greeting screen of LibreOffice, it shows the attached image.
Somehow the image of the last opened windows is visible in the background.

Thinkpad T61
Intel onboard Graphics
No Compiz

Additional package installed for LibreOffice: libreoffice-gtk

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: libreoffice 1:3.4.4-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-13.22-generic 3.0.6
Uname: Linux 3.0.0-13-generic x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Sat Nov 26 10:51:10 2011
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcEnviron:
 LANGUAGE=de_AT:de
 PATH=(custom, no user)
 LANG=de_AT.UTF-8
 SHELL=/bin/bash
SourcePackage: libreoffice
UpgradeStatus: No upgrade log present (probably fresh install)