[Plugin: WordPress Sphinx Search Plugin] error notices

Notice: Undefined index: HTTP_REFERER in /var/www/projects/zdrojak/htdocs/public/soubory/plugins/wordpress-sphinx-plugin/php/sphinxsearch_frontend.php on line 209

Notice: Undefined property: stdClass::$menu in /var/www/projects/zdrojak/htdocs/public/soubory/plugins/wordpress-sphinx-plugin/templates/admin/layout.phtml on line 34

http://wordpress.org/extend/plugins/wordpress-sphinx-plugin/