Description of problem:

F-spot crashes reliably. This happens when uploading photos to a flickr account, when tagging photos, when rotating them etc...

How reproducible:

Always, just use f-spot

Steps to Reproduce:
1. Use f-spot
  
Actual results:

After some operations, f-spot crashes.

Expected results:

Should just do it's job

Additional info:

This is what I get after a session (5 minutes of use or less):

[Info  15:25:23.085] Initializing DBus
[Info  15:25:23.242] Initializing Mono.Addins
[Info  15:25:23.497] Starting new FSpot server

(f-spot:4695): GdkPixbuf-WARNING **: GdkPixbufLoader finalized without calling gdk_pixbuf_loader_close() - this is not allowed. You must explicitly end the data stream to the loader before dropping the last reference.
value = f-spot version 0.4.4 len = 20
value = 2008:11:30 15:28:40 len = 19
value = f-spot version 0.4.4 len = 20
value = 2008:11:30 15:28:40 len = 19
Saved 12381 bytes

(f-spot:4695): Gtk-WARNING **: GtkSpinButton: setting an adjustment with non-zero page size is deprecated
Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
GLib.MissingIntPtrCtorException: GLib.Object subclass FSpot.Widgets.RatingMenuItem must provide a protected or public IntPtr ctor to support wrapping of native object handles.
  at GLib.ObjectManager.CreateObject (IntPtr raw) [0x00000] 
  at GLib.Object.GetObject (IntPtr o, Boolean owned_ref) [0x00000] 
  at Gtk.Container.removed_cb (IntPtr container, IntPtr widget) [0x00000] 
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at Gtk.Container.removed_cb(IntPtr container, IntPtr widget)
   at GLib.ToggleRef.g_object_remove_toggle_ref(IntPtr , GLib.ToggleNotifyHandler , IntPtr )
   at GLib.ToggleRef.Free()
   at GLib.Object.PerformQueuedUnrefs()
   at GLib.Timeout+TimeoutProxy.Handler()
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at Gnome.Program.Run()
   at FSpot.Driver.Main(System.String[] args)

In this case I just finished uploading an image on flickr and opened one on gimp.