Comment 2 for bug 1196236

the exception when crashing after a while seems to usually be:

Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.NullReferenceException: Object reference not set to an instance of an object
  at FSpot.Widgets.SelectionCollectionGridView.OnKeyPressEvent (Gdk.EventKey evnt) [0x00000] in <filename unknown>:0
  at Gtk.Widget.keypressevent_cb (IntPtr widget, IntPtr evnt) [0x00000] in <filename unknown>:0
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at Gtk.Widget.keypressevent_cb(IntPtr widget, IntPtr evnt)
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at FSpot.Driver.Startup()
   at Hyena.Gui.CleanRoomStartup.Startup(Hyena.Gui.StartupInvocationHandler startup)
   at FSpot.Driver.Main(System.String[] args

hth