Xorg crash when running Software Center

Hi, since GTK was updated from GTK 3.6 to 3.8 at the end of last week, I can easily crash X by clicking around in Software Center.

Specifically, the way I usually trigger it was by doing a search inside Software Center for 'gedit' and then clicking the gedit search result and then clicking where it says More Info. At this point X crashes and I'm returned to the login screen.

See also bug 1163886 where many people (including me at certain times) had trouble with Software Center crashing with the GNOME3 PPA on Raring (which included GTK 3.8). We haven't found the root cause for that yet and when Software Center crashed for me then it did not take down X too.

Also see http://ubuntuforums.org/showthread.php?t=2148979 where someone else suffered from the X-killing crash on Saucy.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.9.0-2.7-generic 3.9.3
Uname: Linux 3.9.0-2-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.10.2-0ubuntu1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Tue May 28 15:09:17 2013
DistUpgraded: 2013-05-07 17:00:48,399 DEBUG enabling apt cron job
DistroCodename: saucy
DistroVariant: ubuntu
DkmsStatus: virtualbox, 4.2.10, 3.9.0-2-generic, x86_64: installed
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Toshiba America Info Systems Device [1179:fcd0]
MachineType: TOSHIBA Satellite L745
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.9.0-2-generic root=UUID=da074346-bf87-4cf5-a9ec-8589cb501c4e ro quiet splash usbcore.autosuspend=-1 vt.handoff=7
SourcePackage: xorg
Symptom: display
Title: Xorg crash
UpgradeStatus: Upgraded to saucy on 2013-05-07 (20 days ago)
dmi.bios.date: 06/26/2012
dmi.bios.vendor: INSYDE
dmi.bios.version: 2.60
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Base Board Product Name
dmi.board.vendor: Intel Corp.
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: OEM Chassis Manufacturer
dmi.chassis.version: OEM Chassis Version
dmi.modalias: dmi:bvnINSYDE:bvr2.60:bd06/26/2012:svnTOSHIBA:pnSatelliteL745:pvrPSK0YU-05R02G:rvnIntelCorp.:rnBaseBoardProductName:rvrBaseBoardVersion:cvnOEMChassisManufacturer:ct10:cvrOEMChassisVersion:
dmi.product.name: Satellite L745
dmi.product.version: PSK0YU-05R02G
dmi.sys.vendor: TOSHIBA
version.compiz: compiz 1:0.9.9~daily13.04.18.1~13.04-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.45-1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.3-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.3-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu9
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.7-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1
xserver.bootTime: Mon May 27 13:16:04 2013
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.13.3-0ubuntu9
xserver.video_driver: intel