Clicking the panel button in the scheduler view crashes the application.

Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to
handle the exception.
System.ArgumentException: 'user.png' is not a valid resource name of
assembly 'Whitemice.ZOGI.GtkFolios, Version=1.0.3161.23711,
Culture=neutral, PublicKeyToken=null'.
  at Gdk.PixbufLoader.InitFromAssemblyResource (System.Reflection.Assembly
assembly, System.String resource) [0x00000] 
  at Gdk.PixbufLoader..ctor (System.Reflection.Assembly assembly,
System.String resource) [0x00000] 
  at Gdk.Pixbuf..ctor (System.Reflection.Assembly assembly, System.String
resource) [0x00000] 
  at Gdk.Pixbuf.LoadFromResource (System.String resource) [0x00000] 
  at Whitemice.ZOGI.GtkFolios.PanelDialog.Build () [0x00000] 
  at Whitemice.ZOGI.GtkFolios.PanelDialog..ctor () [0x00000] 
  at Whitemice.ZOGI.GtkFolios.DayStripController.OnPanelChangeClicked
(System.Object sender, System.EventArgs e) [0x00000] 
  at GLib.Signal.voidObjectCallback (IntPtr handle, IntPtr data) [0x00000] 
   at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e,
Boolean is_terminal)
   at GLib.Signal.voidObjectCallback(IntPtr handle, IntPtr data)
   at GLib.Signal.voidObjectCallback(IntPtr , IntPtr )
   at Gtk.Application.gtk_main()
   at Gtk.Application.gtk_main()
   at Gtk.Application.Run()
   at Whitemice.Consonance.Consonance.Main(System.String[] args)