"take screenshot" crashes xfce

[mlg7]

1. Install Ubuntu
2. change the desktop picture ("wallpaper")
3. sudo aptitude install xfce

Hopefully, you may skip to step 7

4. sudo aptitude install gnome
5. sudo aptitude install kde

(6. Ahem... install the kde russian, polish and chinese language packs and switch the system back to English -- if this step is required, this one is really weird)

7. Take the screenshot (default options, whole desktop)

Expected: screenshot is taken, the system does not crash, the desktop image remains the same, the xfce default one with a running rat

Actual: screenshot is taken, xfce desktop is replaced by the image chosen for the unity, THE SYSTEM CRASHES (all desktop controls disappear), you can do nothing with keyboard and/or mouse

The only way that works after this crash is a reboot. (Unsafe one, because you cannot safely shutdown the system either).

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gnome-screenshot 3.2.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
Date: Mon Oct 31 14:01:43 2011
ExecutablePath: /usr/bin/gnome-screenshot
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
SourcePackage: gnome-utils
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.