compiz crashed with SIGSEGV in UnityScreen::paintPanelShadow()

The crash occured when changing the gpu scaling setting in the nvidia settings application. There is a significant pause in display rendering when the issue occurs prior to the crash. lsb_release and policy information for unity and nvidia-current-updates below.

shinji@shinji-linux:~$ lsb_release -rd
Description: Ubuntu oneiric (development branch)
Release: 11.10
shinji@shinji-linux:~$ apt-cache policy unity
unity:
  Installed: 4.22.0-0ubuntu2
  Candidate: 4.22.0-0ubuntu2
  Version table:
 *** 4.22.0-0ubuntu2 0
        500 http://us.archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages
        100 /var/lib/dpkg/status
shinji@shinji-linux:~$ apt-cache policy nvidia-current-updates
nvidia-current-updates:
  Installed: 280.13-0ubuntu4
  Candidate: 280.13-0ubuntu4
  Version table:
 *** 280.13-0ubuntu4 0
        500 http://us.archive.ubuntu.com/ubuntu/ oneiric/restricted amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity 4.22.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu2
Architecture: amd64
CrashCounter: 1
Date: Thu Oct 6 12:46:58 2011
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110921.2)
ProcCmdline: compiz
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fba1378c1c1: movl $0x20050453,(%rax)
 PC (0x7fba1378c1c1) ok
 source "$0x20050453" ok
 destination "(%rax)" (0x00000000) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 ?? () from /usr/lib/nvidia-current-updates/libnvidia-glcore.so.280.13
 UnityScreen::paintPanelShadow(GLMatrix const&) () from /usr/lib/compiz/libunityshell.so
 UnityWindow::glDraw(GLMatrix const&, GLFragment::Attrib&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libunityshell.so
 GLWindow::glDraw(GLMatrix const&, GLFragment::Attrib&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libopengl.so
 GLWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libopengl.so
Title: compiz crashed with SIGSEGV in UnityScreen::paintPanelShadow()
UpgradeStatus: No upgrade log present (probably fresh install)
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