I have a tag without any Icon because of previous bugs. So I tried to assign an Icon to this Tag, as without Icon it is not visible that this tag was assigned to the photos (in the browser window).

Right click on the tag, "Edit Tag", assign any Icon to it. Seems to work, but is not saved anywhere.

It does not seem to be committed until I modify any other tag of any photo. Then F-Spot crashes:

Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.Exception: Can't start a recursive transaction
  at Hyena.Data.Sqlite.HyenaSqliteConnection.BeginTransaction () [0x0009e] in /usr/src/f-spot/lib/Hyena/Hyena.Data.Sqlite/Hyena.Data.Sqlite/HyenaSqliteConnection.cs:265 
  at Db.BeginTransaction () [0x00000] in /usr/src/f-spot/src/Db.cs:273 
  at FSpot.MainWindow.HandleTagEntryTagsAttached (System.Object o, System.String[] new_tags) [0x00060] in /usr/src/f-spot/src/MainWindow.cs:2888 
  at FSpot.Widgets.TagEntry.OnActivated () [0x00090] in /usr/src/f-spot/src/Widgets/TagEntry.cs:261 
  at Gtk.Entry.activated_cb (IntPtr entry) [0x00000] 
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
   at Gtk.Entry.activated_cb(IntPtr entry)
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at FSpot.Driver.Startup() in /usr/src/f-spot/src/main.cs:line 355
   at Hyena.Gui.CleanRoomStartup.Startup(Hyena.Gui.StartupInvocationHandler startup) in /usr/src/f-spot/lib/Hyena/Hyena.Gui/Hyena.Gui/CleanRoomStartup.cs:line 54
   at FSpot.Driver.Main(System.String[] args) in /usr/src/f-spot/src/main.cs:line 272