-> SUCHE (um Zeile 28 rum):
if (!isset($_SERVER['PHP_AUTH_USER']) ||
                !($sessionid = $GLOBALS['egw']->session->create($_SERVER['PHP_AUTH_USER'],$_SERVER['PHP_AUTH_PW'],'text')))

-> ERSETZE durch:
if (isset($_SERVER['PHP_AUTH_USER']))
{
        $user = $_SERVER['PHP_AUTH_USER'];
        $pass = $_SERVER['PHP_AUTH_PW'];
}
elseif(isset($_GET['auth']))
{
        if (preg_match('/Basic\s+(.*)$/i', $_GET['auth'], $auth))
        {
                list($user,$pass) = explode(':', base64_decode($auth[1]));
        }
}
if (!isset($user) || !($sessionid = $GLOBALS['egw']->session->create($user,$pass,'text')))