Comment 20 for bug 1274740

@Tim: yes, currently it's maybe the best solution if we don't have to patch .desktop/autostart files.

But it can also be interesting to have a default mode for all sessions started with gnome-session (Unity, Cairo-Dock, Flashback, etc.) with some exceptions for Gnome-Shell (or Unity if it needs to start some specific apps, e.g.: the future file manager instead of Nautilus).