the issue is not a gnome-desktop one, this component only has a library
which has nothing to do in user switched and the about GNOME dialog, the
issue is not likely a GNOME one but rather an xorg or video driver one,
you might want to look in /var/log/syslog, /var/log/messages and
** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/15907087/Dependencies.txt
** Attachment added: ExtensionSummary.txt
http://launchpadlibrarian.net/15907088/ExtensionSummary.txt
** Attachment added: pluginreg.dat.txt
