Thanks for your reply.

2014-10-13 2:45 GMT+02:00 Grant Rettke <gcr@wisdomandwonder.com>:

> What version of Emacs and org mode are you using?
>

GNU Emacs 24.3.1


> What is your configuration?
>

I'm using org from Elpa.

OS: At the moment Xubuntu 14.04 , but the same problem occurred with Debian
testing.


>
> What action did you perform on what document?
>

Here is a minimal document as example

#+OPTIONS: tex:imagemagick
#+TITLE: Minimal logic
#+AUTHOR: Joseph Vidal-Rosset


\begin{equation}
\neg A \to (A \to B)
\end{equation}




> What did you want and expect to have happen with that action?
>
>
The export to latex works well.

BUT the export to html  works BUT...


> What happened instead?
>

produces always a corrupted png image for the equation. See the attachment.

Thanks for your help

Best wiishes

Jo.