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

[W. Scott Lockwood III]

Binary package hint: gnome-panel

1:
$ lsb_release -rd
Description: Ubuntu lucid (development branch)
Release: 10.04

2:
$ apt-cache policy gnome-panel
gnome-panel:
  Installed: 1:2.29.92.1-0ubuntu1
  Candidate: 1:2.29.92.1-0ubuntu1
  Version table:
 *** 1:2.29.92.1-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages
        100 /var/lib/dpkg/status

3:
The applet to not crash.

4:
The applet crashed.

ProblemType: Crash
Architecture: i386
AssertionMessage: gnome-panel: ../../src/xcb_io.c:385: _XAllocID: Assertion `ret != inval_id' failed.
CrashCounter: 1
Date: Wed Mar 17 17:37:34 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/bin/gnome-panel
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
NonfreeKernelModules: openafs nvidia
Package: gnome-panel 1:2.29.92.1-0ubuntu1
ProcCmdline: gnome-panel
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-16.25-generic-pae
Signal: 6
SourcePackage: gnome-panel
StacktraceTop:
 __kernel_vsyscall ()
 raise () from /lib/tls/i686/cmov/libc.so.6
 abort () from /lib/tls/i686/cmov/libc.so.6
 __assert_fail () from /lib/tls/i686/cmov/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.
Uname: Linux 2.6.32-16-generic-pae i686
UserGroups: adm admin audio cdrom dialout lpadmin plugdev sambashare staff sudo vboxusers
XsessionErrors:
 (gnome-settings-daemon:3503): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (polkit-gnome-authentication-agent-1:3525): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed