Lispworks 4.3: note-editor-definition-parser doesn't seem to work

The macro note-editor-definition-parser in http:server;preliminary.lisp, 
which sets up source browsing via M-. in the lispworks editor doesn't 
work for me in Lispworks 4.3.  From my reading of the Lispworks manual, 
the offending snippet
  ;; use the documented lispworks interface to define a form parser.
  #-(or LispWorks4.0 LispWorks4.1 LispWorks4.2) ; i.e. > 4.2
  `(dspec:define-form-parser
     (,definer
      (:parser ,(dspec:get-form-parser deftype)))))

*should* work, but doesn't.  Replacing the above with the following 
works far better for me.
  ;; use the documented lispworks interface to define a form parser.
  #-(or LispWorks4.0 LispWorks4.1 LispWorks4.2) ; i.e. > 4.2
 `(dspec:define-dspec-alias
     ,definer
     (name &rest args)
     `(,',deftype ,name ,@args)))

I know that this code has been in cl-http for a while now, so I guess I 
would have to ask if the existing code works for anyone else -- maybe I 
am missing something.  If not though, it would be good to get this 
replaced with the version I give above.
Cheers,

Barry Wilkes.