Disable wpautop to content areas

Hi! In the latest version (september 28th) they apply wpautop() to newsletter content areas. Only at preview and send the code is messed up. Also remove_filter wpautop in functions.php is not working. Disable wpautop by plugins is not working.

This code for example:

<code><![if gte mso 9]></td><td><![endif]--></code>

Becomes by preview and sending...

<code><p><!-- [if gte mso 9] ></td><td><![endif]--></p></code>

How can I remove the <p> tags?

I'm looking forward to your reply!