Steps to reproduce:
1. Set 'View' -> 'Tag Icons' -> 'Hidden'
2. *Crash*
3. Try to start F-spot and you'll see it keeps crashing until you use gconf-editor to set 'tag_icon_size' to something larger than zero.


Stack trace:
wouter@nootboek:~$ f-spot
[Info  13:48:29.880] Initializing DBus
[Info  13:48:30.118] Initializing Mono.Addins
[Info  13:48:30.346] Starting new FSpot server

(f-spot:14447): Gtk-CRITICAL **: gtk_window_resize: assertion `width > 0' failed
Count = 3
[Info  13:48:31.999] Starting BeagleService
[Info  13:48:31.999] Hack for gnome-settings-daemon engaged
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 TagSelectionWidget.IconDataFunc (Gtk.TreeViewColumn column, Gtk.CellRenderer renderer, TreeModel model, TreeIter iter) [0x00000] 
  at GtkSharp.TreeCellDataFuncWrapper.NativeCallback (IntPtr tree_column, IntPtr cell, IntPtr tree_model, IntPtr iter, IntPtr data) [0x00000] 
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at GtkSharp.TreeCellDataFuncWrapper.NativeCallback(IntPtr tree_column, IntPtr cell, IntPtr tree_model, IntPtr iter, IntPtr data)
   at GtkSharp.TreeCellDataFuncWrapper.NativeCallback(IntPtr , IntPtr , IntPtr , IntPtr , IntPtr )
   at Gtk.Application.gtk_main()
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at Gnome.Program.Run()
   at FSpot.Driver.Main(System.String[] args)


Other information: