> From: mail@nicolasgoaziou.fr
> 
> I cannot reproduce it. Did you (require 'ox-beamer)? You might also try
> latest Org.
> 

Thank you for the reply. I added require 'ox-beamer to my init file but it did not make any difference. I'm using the lastest Org (8.3beta).
Again, my org file is
* Export Test:PROPERTIES: :EXPORT_FILE_NAME: ./Test:EXPORT_TITLE: Export Test:EXPORT_SUBTREE: [[elisp:(org-beamer-export-to-pdf%20nil%20t)][Beamer]] :END:
Test Contents.

and the tex file I got from clicking on the Beamer link is:

% Created 2015-09-05 Sat 12:31\documentclass[presentation]{beamer}\usepackage[utf8]{inputenc}\usepackage[T1]{fontenc}\usepackage{fixltx2e}\usepackage{graphicx}\usepackage{grffile}\usepackage{longtable}\usepackage{wrapfig}\usepackage{rotating}\usepackage[normalem]{ulem}\usepackage{amsmath}\usepackage{textcomp}\usepackage{amssymb}\usepackage{capt-of}\usepackage{hyperref}\usetheme{default}\date{\today}\title{Export Test}\hypersetup{ pdfauthor={}, pdftitle={Export Test}, pdfkeywords={}, pdfsubject={}, pdfcreator={Emacs 24.5.1 (Org mode 8.3beta)},  pdflang={English}}\begin{document}
\maketitle\begin{frame}{Outline}\tableofcontents\end{frame}
:PROPERTIES: :EXPORT\(_{\text{FILE}}_{\text{NAME}}\): ./Test:EXPORT\(_{\text{TITLE}}\): Export Test:EXPORT\(_{\text{SUBTREE}}\): [[elisp:(org-beamer-export-to-pdf\%20nil\%20t)][Bea\end{document}

You cannot reproduce this? I wonder what is the culprit then. Again, when I manually do this by C-c C-e C-s l P, I get the correct tex file.
Best,Joon