Consider the following minimal example (file) Test equation
This is exported correctly to html.
Date: 2012-07-06 17:45:19 CEST
Author: Uwe Brauer
Org version 7.8.03 with Emacs version 21
![\[
EVal=
\begin {array}{cc}
u&0<br/>
0&u\\
0&0\\
0&0
\end{array}
\]](ltxpng/export-ok_d9265327663ad9be29a2c6969c30cbc0c9db7b9e.png)