X crashes with a certain load of Google Apps pages opened in Firefox 64-bit

[viktor]

Binary package hint: firefox-3.5

Crash occured some time between 14:10 and 14:17. X crashed and I got a console text prompt to log in a couple of seconds before getting the X login window.
I was working under Firefox 3.5.3 64-bit with some Google Docs and Analytics opened. I wasn't doing anything else (Skype was opened but I was not even listening to anything).

Auth.log:
Oct 29 14:10:09 karmik-koala gnome-keyring-daemon[1641]: GVFS-RemoteVolumeMonitor: Owner :1.25 of volume monitor org.gtk.Private.GduVolumeMonitor disconnected from the bus; removing drives/volumes/mounts
Oct 29 14:10:09 karmik-koala gnome-keyring-daemon[1641]: GVFS-RemoteVolumeMonitor: Owner :1.26 of volume monitor org.gtk.Private.GPhoto2VolumeMonitor disconnected from the bus; removing drives/volumes/mounts
Oct 29 14:10:13 karmik-koala gdm-session-worker[1430]: pam_unix(gdm-autologin:session): session closed for user laurent
Oct 29 14:10:31 karmik-koala gdm-session-worker[5025]: pam_unix(gdm:session): session opened for user viktor by (uid=0)
Oct 29 14:10:31 karmik-koala gdm-session-worker[5025]: pam_ck_connector(gdm:session): nox11 mode, ignoring PAM_TTY :0
Oct 29 14:10:35 karmik-koala seahorse-daemon[5141]: init gpgme version 1.1.8
Oct 29 14:10:49 karmik-koala gnome-keyring-ask: could not grab keyboard: 3
Oct 29 14:10:56 karmik-koala gnome-keyring-ask: could not grab keyboard: 3
Oct 29 14:10:59 karmik-koala gnome-keyring-ask: could not grab keyboard: 3
Oct 29 14:17:01 karmik-koala CRON[5515]: pam_unix(cron:session): session opened for user root by (uid=0)
Oct 29 14:17:01 karmik-koala CRON[5515]: pam_unix(cron:session): session closed for user root
Oct 29 14:26:51 karmik-koala firefox: gethostby*.getanswer: asked for "ftp.opera.com IN AAAA", got type "SOA"

Messages:
Oct 29 14:03:44 karmik-koala pulseaudio[1599]: ratelimit.c: 154 events suppressed
Oct 29 14:10:19 karmik-koala bonobo-activation-server (laurent-4970): could not associate with desktop session: Failed to connect to socket /tmp/dbus-6bd5ZSQ2xG: Connexion refusée
Oct 29 14:10:32 karmik-koala pulseaudio[5117]: pid.c: Stale PID file, overwriting.
Oct 29 14:35:51 karmik-koala pulseaudio[5117]: ratelimit.c: 82 events suppressed

ProblemType: Bug
Architecture: amd64
CheckboxSubmission: 3d3139e272c419276633ca58f4d1fe69
CheckboxSystem: daed2f3d6643b4a84b4520a2427f8c2b
Date: Thu Oct 29 14:38:46 2009
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: nvidia
Package: firefox 3.5.3+build1+nobinonly-0ubuntu6
PackageArchitecture: all
ProcEnviron:
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: firefox-3.5
Uname: Linux 2.6.31-14-generic x86_64