compiz crashed with SIGSEGV in unity::ui::KeyboardUtil::GetKeycodeAboveKeySymbol()

not sure what it is

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity 4.22.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
CasperVersion: 1.287
CrashCounter: 1
Date: Thu Mar 29 14:56:57 2012
ExecutablePath: /usr/bin/compiz
LiveMediaBuild: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcCmdline: compiz
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fe33ee73ae7 <_ZN5unity2ui12KeyboardUtil24GetKeycodeAboveKeySymbolEm+39>: movzbl 0xc(%rcx),%edx
 PC (0x7fe33ee73ae7) ok
 source "0xc(%rcx)" (0x0000000c) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 unity::ui::KeyboardUtil::GetKeycodeAboveKeySymbol(unsigned long) () from /usr/lib/compiz/libunityshell.so
 UnityScreen::initAltTabNextWindow() () from /usr/lib/compiz/libunityshell.so
 UnityScreen::initPluginForScreen(CompPlugin*) () from /usr/lib/compiz/libunityshell.so
 CompScreen::initPluginForScreen(CompPlugin*) ()
 CompManager::initPlugin(CompPlugin*) ()
Title: compiz crashed with SIGSEGV in unity::ui::KeyboardUtil::GetKeycodeAboveKeySymbol()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare