compiz crashed with SIGSEGV in nux::WindowCompositor::RenderTopViews()

[Orographic]

Tried to launch a second Chromium browser from Internet Apps in Natty Beta 1 and Compiz crashed.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: libnux-0.9-0 0.9.38-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic-pae 2.6.38
Uname: Linux 2.6.38-7-generic-pae i686
Architecture: i386
Date: Mon Apr 4 15:52:47 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xb4abdab8 <_ZN3nux16WindowCompositor14RenderTopViewsEbRSt4listINS_13ObjectWeakPtrINS_10BaseWindowEEESaIS4_EEbb+2168>: mov 0x4(%esi),%edx
 PC (0xb4abdab8) ok
 source "0x4(%esi)" (0x6565726a) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: nux
StacktraceTop:
 nux::WindowCompositor::RenderTopViews(bool, std::list<nux::ObjectWeakPtr<nux::BaseWindow>, std::allocator<nux::ObjectWeakPtr<nux::BaseWindow> > >&, bool, bool) () from /usr/lib/libnux-0.9.so.0
 nux::WindowCompositor::Draw(bool, bool) () from /usr/lib/libnux-0.9.so.0
 nux::WindowThread::RenderInterfaceFromForeignCmd(nux::Rect*) () from /usr/lib/libnux-0.9.so.0
 UnityScreen::paintDisplay(CompRegion const&) () from /usr/lib/compiz/libunityshell.so
 UnityWindow::glDraw(GLMatrix const&, GLFragment::Attrib&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libunityshell.so
Title: compiz crashed with SIGSEGV in nux::WindowCompositor::RenderTopViews()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 operator* (this=0x8b12cd0, force_draw=false, WindowList=..., drawModal=false, use_fbo=true) at /usr/include/c++/4.5/bits/stl_list.h:134
 operator* (this=0x8b12cd0, force_draw=false, WindowList=..., drawModal=false, use_fbo=true) at /usr/include/c++/4.5/bits/stl_iterator.h:157
 nux::WindowCompositor::RenderTopViews (this=0x8b12cd0, force_draw=false, WindowList=..., drawModal=false, use_fbo=true) at ./WindowCompositor.cpp:1057
 nux::WindowCompositor::Draw (this=0x8b12cd0, SizeConfigurationEvent=false, force_draw=false) at ./WindowCompositor.cpp:882
 nux::WindowThread::RenderInterfaceFromForeignCmd (this=0x8a09878, clip=0xbf8da6e0) at ./WindowThread.cpp:1850