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

when i'm login with unity, i only get an empty blank screen: no dash, no icons.
So i run "setsid unity" into a terminal to get the icons & dash. Compiz is loaded, but fails with " no default decoration found".
Running "gtk-window-decoration --replace" ends with : failed to bind pixmap to texture".

I also get these errors logged:
- gnome-session[13050]: WARNING: Could not parse desktop file /home/oem/.local/share/applications/compiz.desktop or it references a not found TryExec binary
- gnome-session[13050]: WARNING: could not read /home/oem/.local/share/applications/compiz.desktop

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: compiz-gnome 1:0.9.9~daily13.03.25-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-15.25-generic 3.8.4
Uname: Linux 3.8.0-15-generic i686
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86 Kernel Module 313.26 Wed Feb 27 12:36:26 PST 2013
 GCC version: gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-22ubuntu4)
.tmp.unity.support.test.0:

ApportVersion: 2.9.2-0ubuntu5
Architecture: i386
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,workarounds,scale,expo,ezoom]
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CrashCounter: 1
Date: Thu Mar 28 10:44:26 2013
DistUpgraded: Fresh install
DistroCodename: raring
DistroVariant: ubuntu
DkmsStatus:
 nvidia-313-updates, 313.26, 3.8.0-14-generic, i686: installed
 nvidia-313-updates, 313.26, 3.8.0-15-generic, i686: installed
 vboxhost, 4.2.10, 3.8.0-14-generic, i686: installed
 vboxhost, 4.2.10, 3.8.0-15-generic, i686: installed
ExecutablePath: /usr/bin/gtk-window-decorator
GraphicsCard:
 NVIDIA Corporation G86 [GeForce 8500 GT] [10de:0421] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:824f]
Lsusb:
 Bus 002 Device 002: ID 046d:c50e Logitech, Inc. Cordless Mouse Receiver
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: ASUSTEK COMPUTER INC P5W DH Deluxe
MarkForUpload: True
ProcCmdline: /usr/bin/gtk-window-decorator
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-15-generic root=UUID=9e61e83e-bca9-43cf-aa90-5a68892213fa ro crashkernel=384M-2G:64M,2G-:128M raid=noautodetect
SegvAnalysis:
 Segfault happened at: 0xb756c241: mov (%eax),%eax
 PC (0xb756c241) ok
 source "(%eax)" (0x00000008) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 ?? () from /usr/lib/libwnck-1.so.22
 ?? () from /usr/lib/libwnck-1.so.22
 g_object_unref () from /usr/lib/i386-linux-gnu/libgobject-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_object_unref()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: Debian-exim adm admin audio avahi avahi-autoipd backup bin cdrom clamav colord couchdb crontab daemon debian-tor dialout dip disk fax floppy fuse games gnats haldaemon i2c irc klog kmem libuuid lightdm list lp lpadmin mail man messagebus mlocate mysql mythtv netdev news ntp operator pcscd plugdev polkituser powerdev proxy pulse pulse-access root rtkit sambashare saned sasl scanner shadow src ssh ssl-cert staff sudo sys syslog tape tty users utempter utmp uucp vboxusers video voice whoopsie winbindd_priv www-data
dmi.bios.date: 07/22/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3002
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5W DH Deluxe
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3002:bd07/22/2010:svnASUSTEKCOMPUTERINC:pnP5WDHDeluxe:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5WDHDeluxe:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: P5W DH Deluxe
dmi.product.version: System Version
dmi.sys.vendor: ASUSTEK COMPUTER INC
version.compiz: compiz 1:0.9.9~daily13.03.25-0ubuntu1
version.libdrm2: libdrm2 2.4.43-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.3-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.3-0ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.5-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1
xserver.bootTime: Thu Mar 28 10:42:49 2013
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input Logitech USB RECEIVER MOUSE, id 8
 input AT Translated Set 2 keyboard KEYBOARD, id 9
xserver.errors:
 open /dev/dri/card0: No such file or directory
 open /dev/dri/card0: No such file or directory
 open /dev/fb0: No such file or directory
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.13.3-0ubuntu4