Steps to reproduce:
(usually it worked, but tonight I got two crashes)
1. open f-spot (i have about 5000 photos)
2. select a couple of them (maybe double-click on it to choose which you want to export)
3. export on flick
4. after a while, it crashes


Stack trace:
System: Linux 2.6.27.5-117.fc10.x86_64 #1 SMP Tue Nov 18 11:58:53 EST 2008 x86_64
X Vendor: The X.Org Foundation
X Vendor Release: 10503000
Selinux: Enforcing
Accessibility: Disabled
GTK+ Theme: Nodoka
Icon Theme: Fedora

Memory status: size: 0 vsize: 0 resident: 0 share: 0 rss: 0 rss_rlim: 0
CPU usage: start_time: 0 rtime: 0 utime: 0 stime: 0 cutime:0 cstime: 0 timeout: 0 it_real_value: 0 frequency: 0



----------- .xsession-errors (18 sec old) ---------------------
  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)
--------------------------------------------------

Other information:
I think this crashes occur if I double-click on image, then return in browse mode and try to export..