On Thu, May 12, 2016 at 6:20 PM Andrea <agiugliano91@gmail.com> wrote:

I think I saw that, but I did not read it carefully. And since the
autocompletion (I mean <l+TAB) still gives me the #+BEGINE_LaTex it did
not occur to me that may be the problem.

By the way, I did not clone the git repo, so I should be on the master
published on ELPA.

The versions published on ELPA are from the maint branch of org git.

When I give org-version in emacs I get:
Org-mode version 8.3.4 (8.3.4-50-g83e373-elpaplus @
/home/andrea/.emacs.d/elpa/org-plus-contrib-20160509/)

On package-list-packages I have

org 20160509 installed Outline-based notes management and organizer
org-plus-contrib 20160509 installed Outline-based notes management and organizer

Correct, both are the exact same stable 8.3.x versions; just that org-plus-contrib has the packages in contrib/ folder which the other does not have.

Also installing just org-plus-contrib should suffice. You do not need to install both. If you are not using any package from the contrib/ area ( http://orgmode.org/cgit.cgi/org-mode.git/tree/contrib/lisp?h=maint ), you do not need org-plus-contrib, and you can use just the org package.

But the mystery is still unresolved for me.. why did #+BEGIN_EXPORT syntax work for you .. May be someone else more knowledgeable can answer that.