Hi,

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