Comment 2 for bug 1355711

According to preliminary investigations :
  - the issue is certainly related to gnome-session [1] and is said to be fixed in ubuntu

Looking at gnome-session changelog [2], it seems that the following reports *have nothing to do* with the issue at hand:
   - Fix a crash on session end (#709221) [3]
  - gsm-manager: Don't abort when all clients exit (#710480) [4]

[1] : https://launchpad.net/gnome-session
[2] : http://bazaar.launchpad.net/~vcs-imports/gnome-session/master/view/head:/NEWS
[3] : https://bugzilla.gnome.org/show_bug.cgi?id=709221
[4] : https://bugzilla.gnome.org/show_bug.cgi?id=710480