Sorry, I mistyped the first example in my message, it should read:

1. When exporting from an Org file to html, I want this
     [[Emacs#Section-One]]
   to be converted into this:
     <a href="Emacs.html#Section-One">Emacs#Section-One</a>
   but instead Org export produces:
     <a href="Emacs.html">Emacs</a>#Section-One

-- rsw