Something changed recently with the handling of emacs mode first line. I used to have :
#+-*- coding:utf-8; mode:org; mode:org-e-beamer; ispell-local-dictionary:"fr_FR_hunspell" -*-
as the first line of my file. Recently, it started to get exported in LaTeX/Beamer, even with :
#+OPTIONS: skip:t
Workaround : add some tag to the mode line
#+FOO: -*- coding:utf-8; mode:org; mode:org-e-beamer; ispell-local-dictionary:"fr_FR_hunspell" -*-
(One of these days I'll have time again to dig inside the emacs lisp and offer potential fixes)
Regards,
--
Fabrice