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

[Prabin Dahal]

Binary package hint: gnome-panel

Ubuntu Maverick : Linux 2.6.35-28-generic #49-Ubuntu SMP Tue Mar 1 14:40:58 UTC 2011 i686 GNU/Linux
 Installed: 1:2.30.2-1ubuntu3
  Candidate: 1:2.30.2-1ubuntu3
  Version table:
 *** 1:2.30.2-1ubuntu3 0
        500 http://us.archive.ubuntu.com/ubuntu/ maverick/main i386 Packages
        100 /var/lib/dpkg/status

ProblemType: Crash
DistroRelease: Ubuntu 10.10
Package: gnome-panel 1:2.30.2-1ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-28.49-generic 2.6.35.11
Uname: Linux 2.6.35-28-generic i686
Architecture: i386
AssertionMessage: gnome-panel: ../../src/xcb_io.c:385: _XAllocID: Assertion `ret != inval_id' failed.
Date: Tue Apr 5 22:40:21 2011
ExecutablePath: /usr/bin/gnome-panel
GConfNonDefault:
 /apps/panel/general/applet_id_list=[clock_screen0,notification_area_screen0,indicator_applet_screen0,applet_0,applet_2,applet_3]
 /apps/panel/general/object_id_list=[object_1]
 /apps/panel/general/toplevel_id_list=[top_panel_screen0]
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcCmdline: gnome-panel
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: gnome-panel assert failure: gnome-panel: ../../src/xcb_io.c:385: _XAllocID: Assertion `ret != inval_id' failed.
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
XsessionErrors:
 (polkit-gnome-authentication-agent-1:5952): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (nautilus:5947): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
 (empathy:5955): Gdk-CRITICAL **: IA__gdk_window_thaw_toplevel_updates_libgtk_only: assertion `private->update_and_descendants_freeze_count > 0' failed
 (nm-applet:5959): Gdk-CRITICAL **: IA__gdk_window_thaw_toplevel_updates_libgtk_only: assertion `private->update_and_descendants_freeze_count > 0' failed