Comment 29 for bug 526379

I had a similar problem, I always got this messages after some time:

Jul 26 12:50:11 server1 gdm-simple-greeter[1266]: Gtk-WARNING: /build/buildd/gtk+2.0-2.19.6/gtk/gtkwidget.c:5634: widget not within a GtkWindow

Jul 26 12:50:18 server1 gdm-session-worker[1268]: GLib-GObject-CRITICAL: g_value_get_boolean: assertion `G_VALUE_HOLDS_BOOLEAN (value)' failed

But I didn't have another idea about was happen. The error ocurred overall using Firefox or Thunderbird, my session always close

But works for me this option in /etc/X11/xorg.conf

Section "Module"
          ....
         #Load "record"
         Disable "record"
         ....
EndSection

I need to "explicit" disable this module. Then the problem disappear for ever :P

I know the module is loaded by default then if you don't have the option doesn't mean the module is not used, you need disable explicitly.

Regards.