Same problem here I think.

kseise@brick:~$ f-spot -V
F-Spot  0.6.1.1 - (c)2003-2009, Novell Inc
Personal photo management for the GNOME Desktop

kseise@brick:~$ f-spot
[Info  19:50:46.197] Initializing DBus
[Info  19:50:46.319] Initializing Mono.Addins
[Info  19:50:46.534] Starting new FSpot server (f-spot 0.6.1.1)
[Info  19:50:47.452] Starting BeagleService
[Info  19:50:47.477] Hack for gnome-settings-daemon engaged

(f-spot:6821): 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.
Marshaling activate signal
Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> GLib.GException: Duplicate object id 'label6' on line 505 (previously on line 80)
  at GtkBeans.Builder.AddFromString (System.String buffer) [0x00000] 
  at GtkBeans.Builder..ctor (System.Reflection.Assembly assembly, System.String resource_name, System.String translation_domain) [0x00000] 
  at FSpot.UI.Dialog.BuilderDialog..ctor (System.Reflection.Assembly assembly, System.String resourceName, System.String dialogName) [0x00000] 
  at FSpot.Exporter.Facebook.FacebookExportDialog..ctor (IBrowsableCollection selection) [0x00000] 
  at FSpot.Exporter.Facebook.FacebookExport.Run (IBrowsableCollection selection) [0x00000] 
  at FSpot.Extensions.ExportMenuItemNode.OnActivated (System.Object o, System.EventArgs e) [0x00000] 
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] 
  --- End of inner exception stack trace ---
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] 
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] 
  at System.Delegate.DynamicInvokeImpl (System.Object[] args) [0x00000] 
  at System.MulticastDelegate.DynamicInvokeImpl (System.Object[] args) [0x00000] 
  at System.Delegate.DynamicInvoke (System.Object[] args) [0x00000] 
  at GLib.Signal.ClosureInvokedCB (System.Object o, GLib.ClosureInvokedArgs args) [0x00000] 
  at GLib.SignalClosure.Invoke (GLib.ClosureInvokedArgs args) [0x00000] 
  at GLib.SignalClosure.MarshalCallback (IntPtr raw_closure, IntPtr return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data) [0x00000] 
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at GLib.SignalClosure.MarshalCallback(IntPtr raw_closure, IntPtr return_val, UInt32 n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data)
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at FSpot.Driver.Main(System.String[] args)
kseise@brick:~$