compiz crashed with SIGSEGV in Launcher::OnBFBUpdate()

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Binary package hint: unity

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ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: unity 3.6.8-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-7.38-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
Architecture: amd64
CrashCounter: 1
Date: Fri Mar 25 21:54:13 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110302)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f5a68215b50: nop
 PC (0x7f5a68215b50) in non-executable VMA region: 0x7f5a68000000-0x7f5a68268000 rw-p None
SegvReason: executing writable VMA None
Signal: 11
SourcePackage: unity
StacktraceTop:
 ?? ()
 Launcher::OnBFBUpdate(_GVariant*, void*) () from /usr/lib/compiz/libunityshell.so
 ?? () from /usr/lib/compiz/libunityshell.so
 g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in Launcher::OnBFBUpdate()
UpgradeStatus: Upgraded to natty on 2011-03-25 (1 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

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StacktraceTop:
 ?? ()
 Launcher::OnBFBUpdate (data=<value optimized out>, user_data=0x2ffae30) at /build/buildd/unity-3.6.8/src/Launcher.cpp:1468
 ubus_server_pump_message_queue (server=<value optimized out>) at /build/buildd/unity-3.6.8/src/ubus-server.cpp:284
 g_main_dispatch (context=0x232bea0) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:2440
 g_main_context_dispatch (context=0x232bea0) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:3013