Re: comment region in fortran mode

[Richard Stallman]

    (defvar fortran-mode-map
      ...   ; define-key bindings
      (easy-menu-define fortran-menu map "Menu for Fortran mode."
          '("Fortran Comment" :filter
            (lambda (&rest junk) (custom-menu-create 'fortran-comment))))
      ...)

    When this item is in the mode map, selecting any menu item seems to
    deactivate the mark, if it was defined by dragging with the mouse. Eg:

Is it possible that custom-menu-create does something to deactivate
the mark?  You could put code inside that lambda expression
to record the value of mark-active both before and after calling
custom-menu-create.

(lambda (&rest junk)
  (let ((foo mark-active))
    (prog1 (custom-menu-create 'fortran-comment)
    (push (list foo mark-active) foo-list))))

Then you will find out if custom-menu-create indeed does this.
If it does, you can figure out why.

Please respond when you've made some progress.