gnome-screensaver crashed with SIGABRT in __GI___assert_fail()

[SarahSlean]

installed ppa team unity , crashed when i have doing the password .

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: gnome-screensaver 3.2.0-1ubuntu6
ProcVersionSignature: Ubuntu 3.2.0-8.15-generic-pae 3.2.0
Uname: Linux 3.2.0-8-generic-pae i686
ApportVersion: 1.91-0ubuntu1
Architecture: i386
Date: Wed Feb 1 22:55:22 2012
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/gnome-screensaver
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GsettingsGnomeSession:
 org.gnome.desktop.session idle-delay uint32 600
 org.gnome.desktop.session session-name 'ubuntu'
ProcCmdline: gnome-screensaver
ProcEnviron:
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
Signal: 6
SourcePackage: gnome-screensaver
StacktraceTop:
 raise () from /lib/i386-linux-gnu/libc.so.6
 abort () from /lib/i386-linux-gnu/libc.so.6
 __assert_fail () from /lib/i386-linux-gnu/libc.so.6
 ?? () from /usr/lib/i386-linux-gnu/libX11.so.6
 ?? () from /usr/lib/i386-linux-gnu/libX11.so.6
Title: gnome-screensaver crashed with SIGABRT in raise()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
WindowManager: No value set for `/desktop/gnome/session/required_components/windowmanager'

[Apport retracing service (apport)]

StacktraceTop:
 __GI___assert_fail (assertion=0xb6e65a50 "!xcb_xlib_threads_sequence_lost", file=0xb6e65caa "../../src/xcb_io.c", line=273, function=0xb6e65d98 "poll_for_event") at assert.c:81
 poll_for_event (dpy=0x8fa8bf0) at ../../src/xcb_io.c:270
 poll_for_response (dpy=0x8fa8bf0) at ../../src/xcb_io.c:288
 _XEventsQueued (dpy=0x8fa8bf0, mode=2) at ../../src/xcb_io.c:362
 XPending (dpy=0x8fa8bf0) at ../../src/Pending.c:55

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.