[Mono-docs-list] Unhandled Null-Reference-Exception when starting monodoc

[latency]

Hi,

I've just updated my Mono to version 1.1.18 and now MonoDoc isn't working 
anymore.

It fails with that console output:

latency at pi1536:~> monodoc
Bookmark Manager init

Unhandled Exception: System.NullReferenceException: Object reference not set 
to an instance of an object
  at Monodoc.Browser.OnCommentsActivate (System.Object o, System.EventArgs 
args)[0x00000]
  at (wrapper delegate-invoke) 
System.MulticastDelegate:invoke_void_object_Event                                                           
Args (object,System.EventArgs)
  at GLib.Signal.voidObjectCallback (IntPtr handle, IntPtr gch) [0x00000]
  at (wrapper native-to-managed) GLib.Signal:voidObjectCallback 
(intptr,intptr)
  at <0x00000> <unknown method>
  at (wrapper managed-to-native) 
Gtk.CheckMenuItem:gtk_check_menu_item_set_activ                                                           
e (intptr,bool)
  at Gtk.CheckMenuItem.set_Active (Boolean value) [0x00000]
  at Monodoc.Browser..ctor (Boolean UseGecko) [0x00000]
  at Monodoc.Driver.Main (System.String[] args) [0x00000]
latency at pi1536:~>

Does anybody have any clue how to fix this?

Kind Regards,
Valentin S.