compiz crashed with SIGSEGV in sigc::signal_base::impl()

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ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity 4.8.2-0ubuntu4
ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3
Uname: Linux 3.0.0-9-generic x86_64
Architecture: amd64
Date: Fri Aug 26 01:10:53 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110824)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f9a7cedf2ae <_ZNK4sigc11signal_base4implEv+14>: mov 0x8(%rdi),%rbx
 PC (0x7f9a7cedf2ae) ok
 source "0x8(%rdi)" (0x000000f8) not located in a known VMA region (needed readable region)!
 destination "%rbx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 sigc::signal_base::impl() const () from /usr/lib/libsigc-2.0.so.0
 sigc::signal_base::connect(sigc::slot_base const&) () from /usr/lib/libsigc-2.0.so.0
 UnityScreen::UnityScreen(CompScreen*) () from /usr/lib/compiz/libunityshell.so
 PluginClassHandler<UnityScreen, CompScreen, 0>::get(CompScreen*) () from /usr/lib/compiz/libunityshell.so
 CompPlugin::VTableForScreenAndWindow<UnityScreen, UnityWindow>::initScreen(CompScreen*) () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in sigc::signal_base::impl()
UpgradeStatus: No upgrade log present (probably fresh install)
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