Hi,

I've just added this to test your plugin:

$$

x_1 \cdot \left(\begin{array}{c}

1\\

1\\

1\\

\vdots\\

0 \end{array}\right) + x_2 \cdot

\left(\begin{array}{c}

0\\

1\\

1\\

\vdots\\

0 \end{array}\right) + \cdots + x_{256} \cdot

\left(\begin{array}{c}

0\\

0\\

0\\

\vdots\\

1 \end{array}\right) \equiv

\left(\begin{array}{c}

1\\

0\\

1\\

\vdots\\

1 \end{array}\right) \mod 2

$$

It works fine on math.stackexchange.

With your plugin I get the following error:

Warning: fopen(/var/www/wordpress//wp-content/plugins/latex/cache/tex_bd49ec23fe74104e1217164c6307fd48.gif): failed to open stream: Permission denied in /var/www/wordpress/wp-content/plugins/latex/latex.php on line 142 Warning: fputs() expects parameter 1 to be resource, boolean given in /var/www/wordpress/wp-content/plugins/latex/latex.php on line 143 Warning: fclose() expects parameter 1 to be resource, boolean given in /var/www/wordpress/wp-content/plugins/latex/latex.php on line 145 Warning: getimagesize(/var/www/wordpress//wp-content/plugins/latex/cache/tex_bd49ec23fe74104e1217164c6307fd48.gif): failed to open stream: No such file or directory in /var/www/wordpress/wp-content/plugins/latex/latex.php on line 148

The vectors get rendered, but without content.