Error running f-spot built from svn

[Paul Wellner Bou <paul purecodes org>]

Hello,

I checked out and compiled gtk-sharp from svn today to built f-spot svn. 
The compilation finished successful, but I can't start f-spot:

paul dorian:~$ f-spot
[Info  15:26:28.827] Initializing DBus
[Info  15:26:28.909] Initializing Mono.Addins
[Info  15:26:29.033] Starting new FSpot server (f-spot 0.5.0.3)

(f-spot:10488): Gtk-CRITICAL **: gtk_container_add: assertion 
`GTK_IS_WIDGET (widget)' failed

(f-spot:10488): GLib-GObject-CRITICAL **: g_param_spec_pool_lookup: 
assertion `param_name != NULL' failed

(f-spot:10488): GLib-GObject-WARNING **: IA__g_object_newv: object class 
`__gtksharp_0_FSpot_Widgets_Sidebar' has no property named `(null)'

(f-spot:10488): GLib-GObject-CRITICAL **: g_value_transform: assertion 
`G_IS_VALUE (src_value)' failed

(f-spot:10488): GLib-GObject-WARNING **: unable to set property 
`homogeneous' of type `gboolean' from value of type `(null)'

(f-spot:10488): GLib-GObject-CRITICAL **: g_value_transform: assertion 
`G_IS_VALUE (src_value)' failed

(f-spot:10488): GLib-GObject-WARNING **: unable to set property `model' 
of type `GtkTreeModel' from value of type `(null)'
[Warn  15:26:29.530] Caught an exception - Object reference not set to 
an instance of an object (in `f-spot')
  at TagSelectionWidget.Update () [0x00000]
  at TagSelectionWidget..ctor (.TagStore tag_store) [0x00000]
  at MainWindow..ctor (.Db db) [0x00000]
  at FSpot.Core.get_MainWindow () [0x00000]
  at FSpot.Core.Organize () [0x00000]
  at FSpot.Driver.Main (System.String[] args) [0x00000]

(f-spot:10488): Gtk-CRITICAL **: gtk_text_buffer_set_text: assertion 
`text != NULL' failed

(f-spot:10488): Gtk-CRITICAL **: gtk_widget_grab_default: assertion 
`GTK_WIDGET_CAN_DEFAULT (widget)' failed

This happens with a clean .config/f-spot, too.

How can I debug this? Or am I missing a package or a wrong version of a 
library (debian unstable).

Paul.