[Orgmode] LaTeX export works but not in HTML

[Uri Avalos]

The following latex options produce the right format (an article scaled up to 
20pts using the "arev" font):

#+LaTeX_CLASS: article
#+LaTeX_CLASS_OPTIONS: [12pt]
#+LATEX_HEADER: \usepackage{amsmath,amsthm,amssymb} \usepackage[T1]{fontenc} 
\usepackage[20pt]{extsizes} \usepackage{arev} \usepackage[utf8]{inputenc}

However, when I export to HTML, the math equations fail to export. And yes, I 
set the right variable for exporting latex snippets in HTML.

Ideas? The culprit seems to be the arev package. Export works fine if I remove 
that. However, why would that cause a problem? 

Using org-mode 6.36
-- 
--Thanks!
Uriel