session_write_close() bug in 4.1.2?

user-defined session handlers. I'll start with how I have set up the handlers, please correct the process if it is wrong: -- BOF -- function sess_open($save_path, $session_name) {

    // open a database connection

} function sess_close() {

    // close the database connection

} function sess_read($id) {

    // return data from saved record in db

} function sess_write($id, $sess_data) {

    // write $sess_data to record in db

} function sess_destroy($id) {

    // delete record from db

} function sess_gc($maxlifetime) {

    // delete expired records from db

} session_module_name('user'); session_set_save_handler(

    'sess_open', 'sess_close', 'sess_read', 'sess_write',
    'sess_destroy', 'sess_gc'

); session_start(); // php code for page goes here -- EOF -- Doing things that way, everything seems to work.. sorta.. one major exception, though: function redirect_page($url){

    session_write_close();
    header("Location: ${url}");
    exit();

} session_write_close() does not call my sess_write() routine. Instead it seems to be using PHP's default files method every time. Because of this, I am forced to call my lower-level routine directly: sess_write(session_id(), serialize($_SESSION)); This works as a work-a-round, but I would much rather use PHP's pre-defined session_write_close(). Is this a bug or am I doing something wrong? Mike