Comment 34 for bug 199496

According to the changelog, this is in part fixed in gtk-sharp2 2.12.0-2ubuntu2:

gtk-sharp2 (2.12.0-2ubuntu2) hardy; urgency=low

  * debian/patches/02_quit-prepare.dpatch:
    + Add Gtk.Application.QuitPrepare event that allows to execute a delegate
      just before the GTK mainloop is stopped. Preparation of a fix for
      LP #199496. Patch from Mike Kestner.
  * debian/rules:
    + Update API_VERSION to 2.12.0-2ubuntu2 for the above change.

 -- Sebastian Droege < <email address hidden>> Mon, 14 Apr 2008 18:29:58 +0200

And the rest of the fix happened in gnome-sharp2:

gnome-sharp2 (2.20.0-2ubuntu2) hardy; urgency=low

  * debian/patches/02_program-dispose-before-quit.dpatch:
    + Dispose Gnome.Program before we quit the main loop and let us get rid of
      our toggle ref. Otherwise libgnome will unref the global Gnome.Program
      instance in an atexit() handler, calling back into managed code which
      doesn't exist anymore after the call to exit(). This then causes
      a segfault when exiting the application (LP: #199496).
      Patch from Mike Kestner.
  * debian/control:
    + Require libgtk2.0-cil (>= 2.12.0-2ubuntu2) for the above change.

 -- Sebastian Droege < <email address hidden>> Mon, 14 Apr 2008 18:33:58 +0200

so marking this bug as fix released now.