wnck-applet assert failure: wnck-applet: ../../src/xcb_io.c:385: _XAllocID: Assertion `ret != inval_id' failed.

[Frank]

Binary package hint: gnome-panel

Restarted after updating today, started up and received this crash.

ProblemType: Crash
DistroRelease: Ubuntu 10.10
Package: gnome-panel 1:2.30.2-1ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-20.29-generic-pae 2.6.35.4
Uname: Linux 2.6.35-20-generic-pae i686
NonfreeKernelModules: nvidia
Architecture: i386
AssertionMessage: wnck-applet: ../../src/xcb_io.c:385: _XAllocID: Assertion `ret != inval_id' failed.
Date: Tue Sep 7 16:29:16 2010
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,indicator_applet_screen0,notification_area_screen0,clock_screen0,fast_user_switch_screen1,trashapplet_screen1,workspace_switcher_screen1,window_list_screen1,show_desktop_button_screen1,indicator_applet_screen1,notification_area_screen1,clock_screen1]
 /apps/panel/general/object_id_list=[menu_bar_screen0,object_0,browser_launcher_screen1,menu_bar_screen1]
 /apps/panel/general/toplevel_id_list=[bottom_panel_screen0,top_panel_screen0,bottom_panel_screen1,top_panel_screen1]
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta i386 (20100901.1)
ProcCmdline: /usr/lib/gnome-panel/wnck-applet --oaf-activate-iid=OAFIID:GNOME_Wncklet_Factory --oaf-ior-fd=22
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
Signal: 6
SourcePackage: gnome-panel
StacktraceTop:
 __kernel_vsyscall ()
 raise () from /lib/libc.so.6
 abort () from /lib/libc.so.6
 __assert_fail () from /lib/libc.so.6
 _XAllocID () from /usr/lib/libX11.so.6
Title: wnck-applet assert failure: wnck-applet: ../../src/xcb_io.c:385: _XAllocID: Assertion `ret != inval_id' failed.
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #638124, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.