gnome-session crash causes logout

[Lunga Mthembu]

When I'm working in gnome-shell or Unity 3D, gnome-session crashes

The crash occurs when I'm working on different applications, it also occurs at different intevals.

This is the error I obtain when looking in syslog:
gnome-session[1811]: Gdk-WARNING: gnome-session: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.#012

I resorted to Gnome-classic, but the crashes still occur

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gnome-session 3.2.1-0ubuntu8
ProcVersionSignature: Ubuntu 3.2.0-30.48-generic 3.2.27
Uname: Linux 3.2.0-30-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu13
Architecture: i386
Date: Thu Sep 20 19:34:20 2012
InstallationMedia: Ubuntu 10.04.3 LTS "Lucid Lynx" - Release i386 (20110720.1)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_ZA.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-session
UpgradeStatus: Upgraded to precise on 2012-09-01 (19 days ago)
modified.conffile..etc.X11.Xsession.d.55gnome.session.gnomerc: [modified]
mtime.conffile..etc.X11.Xsession.d.55gnome.session.gnomerc: 2012-04-19T16:09:12