XServer crashes when I use xsetwacom !

Binary package hint: xserver-xorg-input-wacom

I installed Natty from scratch with the Beta 2, and it's of course up to date since.
I have a Wacom Intuos3, and when I set anything with the xsetwacom program, it's ok, until I make any use of what has been configured.

E.g, if I set :
xsetwacom set "Wacom Intuos3 9x12 pad" StripLeftUp "key f"
And make any use of the strip, the XServer crashes immediately.

If I set :
xsetwacom set "Wacom Intuos3 9x12 pad" Button 1 "key y"
And make any use of the Button number one, it just crashes, and so on I think you got it.

If I don't try to change the shortcuts with xsetwacom, the defaults just respond as expected.
So when it crashes, the screen just goes out for a second, and I'm on GDM the second after, waiting for me to login.

Wacom Intuos3 9x12, Ubuntu Natty 64, i7 950 | 8 GB | GTX 460 with proprietary drivers, Ubuntu classic session (so without Unity enabled, if this is of any help).

If you need any information that I don't have yet supplied, please be my guest :).
Thanks a lot !
---

Backtrace:
[ 9517.182] 0: /usr/bin/X (xorg_backtrace+0x26) [0x4a2626]
[ 9517.183] 1: /usr/bin/X (0x400000+0x6219a) [0x46219a]
[ 9517.183] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7ff36e476000+0xfc60) [0x7ff36e485c60]
[ 9517.183] 3: /usr/lib/xorg/modules/input/wacom_drv.so (0x7ff3676c2000+0x5da6) [0x7ff3676c7da6]
[ 9517.183] 4: /usr/lib/xorg/modules/input/wacom_drv.so (0x7ff3676c2000+0x6427) [0x7ff3676c8427]
[ 9517.183] 5: /usr/lib/xorg/modules/input/wacom_drv.so (0x7ff3676c2000+0x79b8) [0x7ff3676c99b8]
[ 9517.183] 6: /usr/lib/xorg/modules/input/wacom_drv.so (0x7ff3676c2000+0xbfa5) [0x7ff3676cdfa5]
[ 9517.183] 7: /usr/lib/xorg/modules/input/wacom_drv.so (0x7ff3676c2000+0x4f6c) [0x7ff3676c6f6c]
[ 9517.183] 8: /usr/lib/xorg/modules/input/wacom_drv.so (0x7ff3676c2000+0x517f) [0x7ff3676c717f]
[ 9517.183] 9: /usr/bin/X (0x400000+0x6c657) [0x46c657]
[ 9517.183] 10: /usr/bin/X (0x400000+0x124bbe) [0x524bbe]
[ 9517.183] 11: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7ff36e476000+0xfc60) [0x7ff36e485c60]
[ 9517.183] 12: /lib/x86_64-linux-gnu/libc.so.6 (__select+0x13) [0x7ff36d47f123]
[ 9517.183] 13: /usr/bin/X (WaitForSomething+0x19b) [0x45c76b]
[ 9517.183] 14: /usr/bin/X (0x400000+0x2e032) [0x42e032]
[ 9517.183] 15: /usr/bin/X (0x400000+0x21a7e) [0x421a7e]
[ 9517.183] 16: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xff) [0x7ff36d3bfeff]
[ 9517.183] 17: /usr/bin/X (0x400000+0x21629) [0x421629]
[ 9517.183] Segmentation fault at address 0x164
[ 9517.183]
Caught signal 11 (Segmentation fault). Server aborting
[ 9517.183]

.proc.driver.nvidia.gpus.0: Error: [Errno 21] est un dossier: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 270.41.06 Mon Apr 18 14:53:56 PDT 2011
 GCC version: gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4)
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
DistUpgraded: Fresh install
DistroCodename: natty
DistroRelease: Ubuntu 11.04
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current, 270.41.06, 2.6.38-8-generic, x86_64: installed
 vboxhost, 4.0.6, 2.6.38-8-generic, x86_64: installed
GraphicsCard:
 nVidia Corporation GF104 [GeForce GTX 460] [10de:0e22] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: CardExpert Technology Device [10b0:0401]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110413)
JockeyStatus: xorg:nvidia_current - Pilote d'accélération graphique NVIDIA (Propriétaire, Activé, Non utilisé)
MachineType: Gigabyte Technology Co., Ltd. X58A-UD3R
NonfreeKernelModules: nvidia
Package: xf86-input-wacom (not installed)
ProcEnviron:
 LANGUAGE=fr_FR:en
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=8170500c-374a-4fd6-9897-79f58b73acc4 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Renderer: Unknown
Tags: natty ubuntu compiz-0.9
Uname: Linux 2.6.38-8-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 08/24/2010
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: FB
dmi.board.name: X58A-UD3R
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrFB:bd08/24/2010:svnGigabyteTechnologyCo.,Ltd.:pnX58A-UD3R:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnX58A-UD3R:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: X58A-UD3R
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
version.ia32-libs: ia32-libs 20090808ubuntu13
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.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
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
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7