segfault in unity-window-decorator

Binary package hint: unity

Lost window decoration as well as ability to Alt+Tab between windows and clicking on the ubuntu icon in the upper left corner does not appear do result in anything. The only thing I got to work was by Alt+Ctrl+Fx to open a console and write this report in there. This happened a few times already in combination with open java programs; since I develop Java programs and Ubuntu is my main operating system of choice also for developing, this goes totally against my use case!

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: unity 3.8.12-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
Uname: Linux 2.6.38-8-generic-pae i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,decor,imgpng,grid,snap,move,unitymtgrabhandles,place,regex,animation,mousepoll,gnomecompat,resize,compiztoolbox,wall,vpswitch,session,workarounds,expo,ezoom,staticswitcher,fade,scale,unityshell]
DRM.card0.DP.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.DP.2:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.DP.3:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.HDMI.A.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.HDMI.A.2:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1280x800
 edid-base64: AP///////wAwrhBAAAAAAAASAQOAGhB46oaFlVdNjSUkUFQAAAABAQEBAQEBAQEBAQEBAQEBXB0A8lAgFzBKOjYABaMQAAAZXB0A8lAgFzBKOjYABaMQAAAZAAAADwCBCjyBCjwUAAAJ5Z4IAAAA/gBIVjEyMVdYNC0xMjAKAGw=
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
Date: Fri Jun 10 14:47:47 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus: tp-smapi, 0.40, 2.6.38-8-generic-pae, i686: installed
EcryptfsInUse: Yes
GraphicsCard:
 Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:20e4]
   Subsystem: Lenovo Device [17aa:20e4]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427)
InstallationMedia_: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427)
InstallationMedia__: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427)
MachineType: LENOVO 74532CG
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic-pae root=UUID=c0a5162e-e6b4-443a-92b4-8ef90e9d5b54 ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
ProcVersionSignature__: Ubuntu 2.6.38-8.42-generic-pae 2.6.38.2
Renderer: Unknown
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/08/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 7WET68WW (3.18 )
dmi.board.name: 74532CG
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7WET68WW(3.18):bd03/08/2011:svnLENOVO:pn74532CG:pvrThinkPadX200Tablet:rvnLENOVO:rn74532CG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 74532CG
dmi.product.version: ThinkPad X200 Tablet
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7