Crash gnome-shell

Bonjour,
Suite à une mise à jour de ce week-end dernier, j’ai gnome-shell qui crash. Malheureusement, je ne sais pas quel est le paquet en cause (apt-listbugs ne m’avait rapporté aucun bug sur cette mise à jour).
voici la fin de mon fichier .xsession-errors:

Avertissement du gestionnaire de fenêtres : Log level 16: Could not initialize NMClient /org/freedesktop/NetworkManager: The name org.freedesktop.NetworkManager was not provided by any .service files
(gnome-shell:10309): folks-DEBUG: individual-aggregator.vala:310: Setting primary store IDs to defaults.
(gnome-shell:10309): folks-DEBUG: individual-aggregator.vala:338: Primary store IDs are 'eds' and 'system'.
      JS LOG: GNOME Shell started at Mon Mar 26 2012 19:07:14 GMT+0200 (CEST)

(gnome-shell:10309): folks-WARNING **: Failed to find primary PersonaStore with type ID 'eds' and ID 'system'.
Individuals will not be linked properly and creating new links between Personas will not work.
The configured primary PersonaStore's backend may not be installed. If you are unsure, check with your distribution.
Avertissement du gestionnaire de fenêtres : CurrentTime used to choose focus window; focus window may not be correct.
Avertissement du gestionnaire de fenêtres : Got a request to focus the no_focus_window with a timestamp of 0.  This shouldn't happen!
Avertissement du gestionnaire de fenêtres : Log level 8: dbus_set_g_error: assertion `gerror == NULL || *gerror == NULL' failed
gnome-shell-calendar-server[10349]: Got HUP on stdin - exiting
gnome-session[10228]: WARNING: Application 'gnome-shell.desktop' killed by signal
WARNING: gnome-keyring:: couldn't connect to: /tmp/keyring-uaJ7na/pkcs11: Aucun fichier ou dossier de ce type
Avertissement du gestionnaire de fenêtres : Log level 16: Could not initialize NMClient /org/freedesktop/NetworkManager: The name org.freedesktop.NetworkManager was not provided by any .service files
(gnome-shell:10370): folks-DEBUG: individual-aggregator.vala:310: Setting primary store IDs to defaults.
(gnome-shell:10370): folks-DEBUG: individual-aggregator.vala:338: Primary store IDs are 'eds' and 'system'.
      JS LOG: GNOME Shell started at Mon Mar 26 2012 19:07:17 GMT+0200 (CEST)

(gnome-shell:10370): folks-WARNING **: Failed to find primary PersonaStore with type ID 'eds' and ID 'system'.
Individuals will not be linked properly and creating new links between Personas will not work.
The configured primary PersonaStore's backend may not be installed. If you are unsure, check with your distribution.
Avertissement du gestionnaire de fenêtres : Log level 8: dbus_set_g_error: assertion `gerror == NULL || *gerror == NULL' failed
gnome-session[10228]: WARNING: App 'gnome-shell.desktop' respawning too quickly
gnome-shell-calendar-server[10403]: Got HUP on stdin - exiting
gnome-session[10228]: WARNING: Application 'gnome-shell.desktop' killed by signal

et:

root@debian:/home/olivier# dmesg | tail gnome-shell[10370]: segfault at 1 ip 00007f9db95be4c7 sp 00007fffeba07658 error 4 in libglib-2.0.so.0.3000.2[7f9db958c000+f6000] gnome-shell[15516]: segfault at 1 ip 00007fca5d80b4c7 sp 00007fffa437c258 error 4 in libglib-2.0.so.0.3000.2[7fca5d7d9000+f6000] gnome-shell[15576]: segfault at 1 ip 00007f10cf88e4c7 sp 00007fff6b35ac98 error 4 in libglib-2.0.so.0.3000.2[7f10cf85c000+f6000] nvidia 0000:01:00.0: PCI INT A disabled nvidia 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 nvidia 0000:01:00.0: setting latency timer to 64 vgaarb: device changed decodes: PCI:0000:01:00.0,olddecodes=none,decodes=none:owns=io+mem NVRM: loading NVIDIA UNIX x86_64 Kernel Module 173.14.31 Tue Jul 12 09:24:17 PDT 2011 gnome-shell[1112]: segfault at 1 ip 00007faa06c364c7 sp 00007fffb6782e68 error 4 in libglib-2.0.so.0.3000.2[7faa06c04000+f6000] gnome-shell[1169]: segfault at 1 ip 00007f3ded1df4c7 sp 00007fffc2e60d58 error 4 in libglib-2.0.so.0.3000.2[7f3ded1ad000+f6000]

Apparemment ça serait libglib-2.0.so qui serait en cause?
Comment faire pour savoir à quel paquet il appartient?
je précise que la session classic de gnome ne crash pas.
Merci d’avance de votre précieuse aide.

si c’est le portable de ta signature , je trouve bizarre d’utiliser un si vieux driver graphique (173.14.31)

j’ai downgradé en version 173 car au début je pensais que mon problème venait des derniers drivers (295.33-1) qui avaient été justement mis à jour le week-end dernier…
mais dès que gnome-shell arrêtera de planter, je remettrais les derniers drivers.