I've recently switched over to gnome desktop environment with gnome-shell preview as my compositing manager....

Everything is good except for this process xfce4-notifyd which autostarts somehow.... The problem with this process is it acts as the default notification daemon over-riding gnome-shell's built-in notification support and tends to display balloon popups on the top right corner....

If i kill this process everything is good.... But on restart it autostarts again somehow.... Anyone have any ideas which are the places containing the autostart config files ?

I looked through the items in gnome-session-properties and also in these places:
But couldn't find any entries related to xfce4-notifyd.