Change the function qa_get_one_user_html, into qa-app-users.php file, with this:
function qa_get_one_user_html($handle, $microformats)
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
return strlen($handle) ? (qa_html($handle)) : '';
}
Regards.