X11 crashe on login

[Hekelos]

When I'm login i see my desk next crash.
I saw block of color on screen.

ProblemType: Crash
Architecture: i386
AssertionMessage: gnome-panel: ../../src/xcb_io.c :378 : _XAllocID: L'assertion « ret != inval_id » a échoué.
Date: Sat Oct 31 11:00:51 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/gnome-panel
Package: gnome-panel 1:2.28.0-0ubuntu6
ProcCmdline: gnome-panel
ProcEnviron:
 LANGUAGE=fr_FR.UTF-8
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.27-14.34-generic
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 :378 : _XAllocID: L'assertion « ret != inval_id » a échoué.
Uname: Linux 2.6.27-14-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin plugdev sambashare video

[Apport retracing service (apport)]

StacktraceTop:__kernel_vsyscall ()
*__GI_raise (sig=6)
*__GI_abort () at abort.c:92
*__GI___assert_fail (
_XAllocID (dpy=0x8116770) at ../../src/xcb_io.c:378

[Pedro Villavicencio (pedro)]

are you still having this issue? May you tell us a few easy steps on how to reproduce it? Thanks.