compiz crashed with SIGSEGV in g_source_unref()

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Binary package hint: compiz

The problem stills in Xubuntu 11.04 beta2

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: compiz-core 1:0.9.4+bzr20110415-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
DRM.card0.DVI.D.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
DRM.card0.LVDS.1:
 status: connected
 enabled: enabled
 dpms: On
 modes: 1024x768
 edid-base64:
DRM.card0.VGA.1:
 status: disconnected
 enabled: disabled
 dpms: Off
 modes:
 edid-base64:
Date: Sun Apr 17 11:57:25 2011
DistUpgraded: Log time: 2011-04-16 16:34:30.303752
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) [8086:2a02] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Fujitsu Limited. Device [10cf:13f9]
   Subsystem: Fujitsu Limited. Device [10cf:13f9]
InstallationMedia: Xubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101008.1)
InstallationMedia_: Xubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101008.1)
MachineType: FUJITSU SIEMENS LIFEBOOK T4220
PccardctlIdent:
 Socket 0:
   no product info available
 Socket 1:
   product info: "O2Micro", "SmartCardBus Reader", "V1.0", ""
   manfid: 0xffff, 0x0001
PccardctlStatus:
 Socket 0:
   no card
 Socket 1:
   5.0V 16-bit PC Card
   Subdevice 0 (function 0) [unbound]
ProcCmdline: compiz --replace
ProcEnviron:
 PATH=(custom, no user)
 LANG=ca_ES.UTF-8
 LANGUAGE=ca_ES:en
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=47338aa6-f49c-496e-873e-6a8fdf413675 ro quiet splash vt.handoff=7
ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Renderer: Software
SegvAnalysis:
 Segfault happened at: 0x7f17c9913f45 <g_source_unref+5>: mov 0x20(%rdi),%rsi
 PC (0x7f17c9913f45) ok
 source "0x20(%rdi)" (0xaef7f0120012d) not located in a known VMA region (needed readable region)!
 destination "%rsi" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: compiz
StacktraceTop:
 g_source_unref () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 PrivateScreen::~PrivateScreen() ()
 PrivateScreen::~PrivateScreen() ()
 CompScreen::~CompScreen() ()
 CompScreen::~CompScreen() ()
Title: compiz crashed with SIGSEGV in g_source_unref()
UpgradeStatus: Upgraded to natty on 2011-04-16 (0 days ago)
UserGroups:

XsessionErrors:
 (nautilus:2092): Eel-WARNING **: "unique eel_ref_str" hash table still has 3 elements at quit time (keys above)
 (nautilus:2092): Eel-WARNING **: "nautilus-directory.c: directories" hash table still has 3 elements at quit time
dmi.bios.date: 02/23/2009
dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd.
dmi.bios.version: Version 1.18
dmi.board.name: FJNB1D4
dmi.board.vendor: FUJITSU
dmi.board.version: CP336664-01
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU SIEMENS
dmi.chassis.version: T42__
dmi.modalias: dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.18:bd02/23/2009:svnFUJITSUSIEMENS:pnLIFEBOOKT4220:pvr:rvnFUJITSU:rnFJNB1D4:rvrCP336664-01:cvnFUJITSUSIEMENS:ct10:cvrT42__:
dmi.product.name: LIFEBOOK T4220
dmi.sys.vendor: FUJITSU SIEMENS
version.compiz: compiz N/A
version.ia32-libs: ia32-libs 20090808ubuntu12
version.libdrm2: libdrm2 2.4.23+git20110119.550fe2ca-0ubuntu0sarvatt~maverick
version.libgl1-mesa-dri: libgl1-mesa-dri N/A
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11.0+git20110222.7aeb610f-0ubuntu0sarvatt~maverick
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #740897, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.