at-spi-bus-launcher crashed with SIGSEGV in XFlush()

[Stephan]

crash shortly after login

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: at-spi2-core 2.1.5-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-8.11-generic 3.0.1
Uname: Linux 3.0.0-8-generic x86_64
Architecture: amd64
CrashCounter: 1
Date: Sat Aug 20 06:57:38 2011
ExecutablePath: /usr/lib/at-spi2-core/at-spi-bus-launcher
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110803.1)
ProcCmdline: /usr/lib/at-spi2-core/at-spi-bus-launcher
ProcEnviron:
 SHELL=/bin/false
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
SegvAnalysis:
 Segfault happened at: 0x7f06a3e8efe1 <XFlush+1>: mov 0x968(%rdi),%rax
 PC (0x7f06a3e8efe1) ok
 source "0x968(%rdi)" (0x00000968) not located in a known VMA region (needed readable region)!
 destination "%rax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: at-spi2-core
StacktraceTop:
 XFlush () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 ?? ()
 ?? ()
 ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: at-spi-bus-launcher crashed with SIGSEGV in XFlush()
UpgradeStatus: Upgraded to oneiric on 2011-08-11 (8 days ago)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 XFlush (dpy=0x0) at ../../src/Flush.c:38
 ensure_a11y_bus (app=<optimized out>) at at-spi-bus-launcher.c:193
 handle_method_call (connection=<optimized out>, sender=<optimized out>, object_path=<optimized out>, interface_name=<optimized out>, method_name=<optimized out>, parameters=<optimized out>, invocation=0x23afe40, user_data=0x23a7c00) at at-spi-bus-launcher.c:219
 call_in_idle_cb (user_data=<optimized out>) at /build/buildd/glib2.0-2.29.16/./gio/gdbusconnection.c:4440
 g_main_dispatch (context=0x23a8400) at /build/buildd/glib2.0-2.29.16/./glib/gmain.c:2439