monodevelop crashes on save

Binary package hint: monodevelop

version:
  ubuntu Gutsy development branch (i think it was tribe 5), with all current updates.
  monodevelop 0.14 installed from repository

system:
  Dell Latitude D610 laptop

procedure:
  create a new GTK# 2.0 project.
  open MainWindow.cs
  select Designer mode
  add any container widget to the blank form
  add a Menu Bar widget
  click in the newly placed widget to edit it
  type anything in it
  try to save your project.
  (monodevelop crashes)

this also happens when i use a toolbar widget instead of menu bar

this is my first bug report, please bear with me if I haven't provided all necessary information.
it's quite frustrating, not being able to save.
the time-based autosaves are crashing it as well.

whatever is wrong appears to only manifest itself once the Menu Bar or toolbar widget has been altered.
saves after adding the widget to the form, but before editing it do not cause crashing.