Please describe the problem:
Recently strange things happen to me when opening the icon dialog for certain tags.

- I right-click on a tag and then on 'Edit selected tag'.
- I click on the icon.
- The dialog appears where I can choose an icon.
- It says 'Photo 1 of 4'.
- But 

Steps to reproduce:
- I right-click on a tag and then on 'Edit selected tag'.
- I click on the icon.
- The dialog appears where I can choose an icon.
- It says 'Photo 1 of 4'.

Actual results:
I am not able to select one of the other 3 photos.  Using up/down box has no effect: clicking on the arrows does not even change the number.  Entering a number manually has no effect.  I can select a file manually but then I don't have the possibility to select an area in it, because the area view does not change (still shows photo 1).

For some other tags I am able to scroll through only some of the pictures (for instance it would say 'Photo 1 of 24' but I can only scroll to photo 17 and then I can't go further, only back).

Sometimes, when I click on 'Edit selected tag' and then on the icon, F-Spot freezes for a significant time.

Expected results:


Does this happen every time?
Yes (but not for all tags).

Other information:
In the debug log I find repetitions of the following message:

Domain: 'Gtk' Level: Critical
Message: gtk_icon_theme_load_icon: assertion `icon_name != NULL' failed
Trace follows:
   at GLib.Log.PrintTraceLogFunction(System.String domain, LogLevelFlags level, System.String message)
   at Gtk.IconTheme.gtk_icon_theme_load_icon(IntPtr , IntPtr , Int32 , Int32 , IntPtr ByRef )
   at Gtk.IconTheme.LoadIcon(System.String icon_name, Int32 size, IconLookupFlags flags)
   at FSpot.Utils.GtkUtil.TryLoadIcon(Gtk.IconTheme theme, System.String icon_name, Int32 size, IconLookupFlags flags)
   at FSpot.Tag.set_ThemeIconName(System.String value)
   at TagCommands+EditIcon.Execute(FSpot.Tag t)
   at TagCommands+Edit.HandleIconButtonClicked(System.Object sender, System.EventArgs args)
   at System.Reflection.MonoMethod.InternalInvoke(System.Object , System.Object[] , System.Exception ByRef )
   at System.Reflection.MonoMethod.Invoke(System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture)
   at System.Reflection.MethodBase.Invoke(System.Object obj, System.Object[] parameters)
   at System.Delegate.DynamicInvokeImpl(System.Object[] args)
   at System.MulticastDelegate.DynamicInvokeImpl(System.Object[] args)
   at System.Delegate.DynamicInvoke(System.Object[] args)
   at GLib.Signal.ClosureInvokedCB(System.Object o, GLib.ClosureInvokedArgs args)
   at GLib.SignalClosure.Invoke(GLib.ClosureInvokedArgs args)
   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.Dialog.gtk_dialog_run(IntPtr )
   at Gtk.Dialog.Run()
   at TagCommands+Edit.Execute(FSpot.Tag t)
   at MainWindow.HandleEditSelectedTagWithTag(FSpot.Tag tag)
   at TagPopup+<Activate>c__AnonStorey18.<>m__26(System.Object , System.EventArgs )
   at System.Reflection.MonoMethod.InternalInvoke(System.Object , System.Object[] , System.Exception ByRef )
   at System.Reflection.MonoMethod.Invoke(System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture)
   at System.Reflection.MethodBase.Invoke(System.Object obj, System.Object[] parameters)
   at System.Delegate.DynamicInvokeImpl(System.Object[] args)
   at System.MulticastDelegate.DynamicInvokeImpl(System.Object[] args)
   at System.Delegate.DynamicInvoke(System.Object[] args)
   at GLib.Signal.ClosureInvokedCB(System.Object o, GLib.ClosureInvokedArgs args)
   at GLib.SignalClosure.Invoke(GLib.ClosureInvokedArgs args)
   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 Gnome.Program.Run()
   at FSpot.Driver.Main(System.String[] args)