There is a bug in the filter method AesopBrowserClasses->browser_body_class at line 84, row 67.<br />
When the HTTP_USER_AGENT header field is not present in the client request, the method should return the current body classes, not false.<br />
The code in the line should be then:</p>
<p>if (!array_key_exists(‘HTTP_USER_AGENT’, $_SERVER)) return $classes;</p>
<p>This happens to us when using special WordPress hosting, like HardyPress<br />
where there is a crawler that makes the site static before publishing.