gnome-settings-daemon crashed with signal 5 in _XReply() (XGetWindowProperty)

[Rachel Greenham]

possible dupe of 907052 - reporting as new in case attached files are useful. Context is attempting to log in via xdmcp from xephyr on a mac. Not sure if this was thrown while initially attempting unity default (at which only the desktop worked) or subsequently unity2d which is partially functional (am reporting this through it) with redraw glitches, and is when i first saw the 'report a problem' dialogue.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: gnome-settings-daemon 3.2.2-0ubuntu13
ProcVersionSignature: Ubuntu 3.2.0-12.20-generic 3.2.2
Uname: Linux 3.2.0-12-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
Date: Mon Jan 30 13:51:11 2012
ExecutablePath: /usr/lib/gnome-settings-daemon/gnome-settings-daemon
ExecutableTimestamp: 1327797225
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcCmdline: /usr/lib/gnome-settings-daemon/gnome-settings-daemon
ProcCwd: /home/rachel
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
Signal: 5
SourcePackage: gnome-settings-daemon
StacktraceTop:
 ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 XGetWindowProperty () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 xkl_engine_get_window_title () from /usr/lib/libxklavier.so.16
 xkl_get_debug_window_title () from /usr/lib/libxklavier.so.16
Title: gnome-settings-daemon crashed with signal 5 in _XReply()
UpgradeStatus: Upgraded to precise on 2012-01-21 (9 days ago)
UserGroups: adm admin audio cdrom dialout floppy fuse lpadmin netdev plugdev sambashare sudo video

[Apport retracing service (apport)]

StacktraceTop:
 XGetWindowProperty (dpy=0x1f28440, w=16777221, property=39, offset=0, length=-1, delete=0, req_type=31, actual_type=0x7fff82c50888, actual_format=0x7fff82c508ac, nitems=0x7fff82c50890, bytesafter=0x7fff82c50898, prop=0x7fff82c508a0) at ../../src/GetProp.c:61
 xkl_engine_get_window_title (engine=<optimized out>, w=<optimized out>) at xklavier_util.c:68
 xkl_get_debug_window_title (win=<optimized out>, engine=<optimized out>) at xklavier_util.c:136
 xkl_get_debug_window_title (engine=<optimized out>, win=<optimized out>) at xklavier_util.c:130
 xkl_engine_process_create_window_evt (engine=0x20f8820, cev=0x7fff82c509d0) at xklavier_evt.c:451