wnck-applet crashed with SIGSEGV in dbus_connection_get_dispatch_status()

[Somberlain]

crashed when i played a game

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: gnome-panel 1:2.32.1-0ubuntu6.5
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Tue Sep 13 17:44:33 2011
ExecutablePath: /usr/lib/gnome-panel/wnck-applet
GConfNonDefault:
 /apps/panel/general/applet_id_list=[fast_user_switch_screen0,trashapplet_screen0,workspace_switcher_screen0,window_list_screen0,show_desktop_button_screen0,clock_screen0,applet_3,fast_user_switch_screen1,trashapplet_screen1,workspace_switcher_screen1,window_list_screen1,show_desktop_button_screen1,indicator_applet_screen1,notification_area_screen1,clock_screen1,applet_4,applet_5,applet_7,applet_8,applet_10]
 /apps/panel/general/object_id_list=[browser_launcher_screen0,menu_bar_screen0,browser_launcher_screen1,menu_bar_screen1,object_0]
 /apps/panel/general/toplevel_id_list=[bottom_panel_screen0,top_panel_screen0,bottom_panel_screen1,top_panel_screen1]
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcCmdline: /usr/lib/gnome-panel/wnck-applet
ProcEnviron:
 SHELL=/bin/bash
 LANGUAGE=ru_RU:en
 LANG=ru_RU.UTF-8
Signal: 11
SourcePackage: gnome-panel
StacktraceTop:
 dbus_connection_get_dispatch_status () from /lib/x86_64-linux-gnu/libdbus-1.so.3
 ?? () from /usr/lib/libgvfscommon.so.0
 g_main_context_prepare () 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: wnck-applet crashed with SIGSEGV in dbus_connection_get_dispatch_status()
UpgradeStatus: Upgraded to natty on 2011-07-22 (52 days ago)
UserGroups: adm admin cdrom dialout lp lpadmin plugdev sambashare vboxusers

[Apport retracing service (apport)]

StacktraceTop:
 dbus_connection_get_dispatch_status (connection=0x2589030) at dbus-connection.c:4355
 ?? ()
 ?? ()
 g_main_context_prepare (context=0x23bbbf0, priority=0x7fff3550a97c) at /build/buildd/glib2.0-2.28.6/./glib/gmain.c:2761
 g_main_context_iterate (context=0x23bbbf0, block=1, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.28.6/./glib/gmain.c:3071