Hopefully now all calls to escape() are replaced with ajaxEscape() in response to Tomasz's forum post; remove deprecated version of show_category_info() from functions.php
echo '<p>The administrator has flagged the page "' . $_SERVER['REQUEST_URI'] . '" so that it cannot be accessed from the web. Perhaps this is because this is a cache or includes directory and only needs to be accessed by scripts.</p><p>HTTP error: 403 Forbidden</p>';