another headers not sent error
i can't test this properly yet as paypal express is having intermittent faults on the sandbox. will let you know.
i do have another issue though with headers not sent.
i checked the line and can't find anything.
grateful if you could take a look
Warning: Cannot modify header information - headers already sent by (output started at /.../htdocs/checkout_success.php:134) in /.../htdocs/checkout_success.php on line 448