gksu crashed with SIGSEGV in gdk_window_set_opacity()

Crashed when switching from ubuntu 2d to normal ubuntu theme

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: gksu 2.0.2-5ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-10.16-generic 3.0.4
Uname: Linux 3.0.0-10-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 1.22.1-0ubuntu2
Architecture: amd64
Date: Mon Sep 12 17:56:08 2011
ExecutablePath: /usr/bin/gksu
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110901)
ProcCmdline: /usr/bin/gksu --desktop /usr/share/applications/update-manager.desktop -- /usr/bin/update-manager --dist-upgrade
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f257f3368e9 <gdk_window_set_opacity+25>: mov (%rbx),%rdx
 PC (0x7f257f3368e9) ok
 source "(%rbx)" (0x00000427) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: gksu
StacktraceTop:
 gdk_window_set_opacity () from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
 ?? () from /usr/lib/libgksu2.so.0
 g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: gksu crashed with SIGSEGV in gdk_window_set_opacity()
UpgradeStatus: Upgraded to oneiric on 2011-09-12 (0 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare