gtk-window-decorator crashed with SIGSEGV in g_datalist_id_set_data_full()

How to reproduce:
1. Open VLC
2. "File" -> "Open disc"

What happens?
The window decorator crashes.

Workarround:
1. Install qt4-qtconfig package
2. Open it and choose any other theme than "Desktop Settings"

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: compiz-gnome 1:0.9.5.0-0ubuntu5
ProcVersionSignature: Ubuntu 3.0.0-8.11-generic 3.0.1
Uname: Linux 3.0.0-8-generic i686
Architecture: i386
BootLog:
 fsck from util-linux 2.19.1
 fsck from util-linux 2.19.1
 /dev/sda3: limpo, 226101/995520 arquivos, 1765453/3977728 blocos
 /dev/sda5: limpo, 123145/6168576 arquivos, 11079186/24657920 blocos (verificar na montagem 4 )
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell]
CompositorRunning: compiz
CrashCounter: 1
Date: Wed Aug 17 13:27:39 2011
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
ExecutablePath: /usr/bin/gtk-window-decorator
GraphicsCard:
 Intel Corporation 82945G/GZ Integrated Graphics Controller [8086:2772] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:2a60]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha i386 (20110721)
MachineType: HP-Pavilion KC713AA-AC4 a6221br
ProcCmdline: /usr/bin/gtk-window-decorator
ProcCwd: /home/marco
ProcEnviron:
 LANGUAGE=pt_BR:pt:en
 PATH=(custom, no user)
 LANG=pt_BR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-8-generic root=UUID=2fef4aea-63ce-4d85-aea4-1a2ea2a73b17 ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x679fd4 <g_datalist_id_set_data_full+356>: mov 0x0(%ebp),%ecx
 PC (0x00679fd4) ok
 source "0x0(%ebp)" (0xaaaaaaa8) not located in a known VMA region (needed readable region)!
 destination "%ecx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 g_datalist_id_set_data_full () from /lib/i386-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0
 g_object_unref () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
Title: gtk-window-decorator crashed with SIGSEGV in g_datalist_id_set_data_full()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 08/15/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: v5.10
dmi.board.name: Lucknow
dmi.board.vendor: Foxconn
dmi.board.version: 1.0
dmi.chassis.type: 3
dmi.chassis.vendor: Foxconn
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrv5.10:bd08/15/2007:svnHP-Pavilion:pnKC713AA-AC4a6221br:pvr:rvnFoxconn:rnLucknow:rvr1.0:cvnFoxconn:ct3:cvr:
dmi.product.name: KC713AA-AC4 a6221br
dmi.sys.vendor: HP-Pavilion
drirc:
 <driconf>
 </driconf>
version.compiz: compiz 1:0.9.5.0-0ubuntu5
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1