> From: Lennart Borgman <lennart.borgman@gmai...>
> Date: Thu, 10 May 2012 19:15:56 +0200
> Cc: parozusa@web...., help-emacs-windows@gnu....
>
> I see the problem only now and then. In those cases Emacs shows the
> menus perfectly well from the beginning, but then later that strange
> behavior above appears.

That's exactly how the bug I described manifests itself.