compiz crashed with SIGSEGV in sigc::internal::signal_emit0<void, sigc::nil>::emit()

[Omer Akram]

This crash is daily caused when I am raising a minimized window in the lower part of the launcher. this is a critical one.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: libnux-0.9-0 0.9.30-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-6.34-generic 2.6.38-rc7
Uname: Linux 2.6.38-6-generic i686
Architecture: i386
Date: Thu Mar 10 21:07:49 2011
Disassembly: => 0x31: Cannot access memory at address 0x31
ExecutablePath: /usr/bin/compiz
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110226)
ProcCmdline: compiz
ProcCwd: /home/om26er
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x31: Cannot access memory at address 0x31
 PC (0x00000031) not located in a known VMA region (needed executable region)!
SegvReason: executing NULL VMA
Signal: 11
SourcePackage: nux
StacktraceTop:
 ?? ()
 sigc::internal::signal_emit0<void, sigc::nil>::emit(sigc::internal::signal_impl*) () from /usr/lib/compiz/libunityshell.so
 Launcher::EventLogic() () from /usr/lib/compiz/libunityshell.so
 Launcher::DrawContent(nux::GraphicsEngine&, bool) () from /usr/lib/compiz/libunityshell.so
 nux::View::ProcessDraw(nux::GraphicsEngine&, bool) () from /usr/lib/libnux-0.9.so.0
Title: compiz crashed with SIGSEGV in sigc::internal::signal_emit0<void, sigc::nil>::emit()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 ?? ()
 ql_compute_outline (cr=0xb30f138, line_width=2.66246708e-44, rgba_line=0x101, size=8.07147915e-43) at /build/buildd/unity-3.6.4/src/QuicklistView.cpp:1335
 _align (this=0xa58c020) at /build/buildd/unity-3.6.4/src/QuicklistMenuItemCheckmark.cpp:32
 QuicklistMenuItemCheckmark::UpdateTexture (this=0xa58c020) at /build/buildd/unity-3.6.4/src/QuicklistMenuItemCheckmark.cpp:346
 QuicklistView::RecvItemMouseDrag (this=0xa58c020, item=0xa4862e8, x=0, y=0) at /build/buildd/unity-3.6.4/src/QuicklistView.cpp:690