Hi
I have installed 1.3.7
using PayPal express (patched to PPEC-137-patches-May10-07b) The error occured without this patch so I thought I would give the patch a try!

When I go through the checkout I get the error:
MODULE_PAYMENT_PAYPALWPP_GEN_ERROR (10410 Invalid token)

the log file shows:
$this->showPaymentPage NOT true, and NO custom page selected ... using SHIPPING as default
=================================
Jun-06-2007 08:31:31
termEC-10
Redirecting to checkout_shipping - Stack: checkout_shipping
Message: MODULE_PAYMENT_PAYPALWPP_GEN_ERROR (10410 Invalid token)

PayPal IPN is On and points to ipn_main_handler.php on our site.

It appears to be returning back to the Delivery Information page, even if you go all the way though the cart and select Paypal express as the payment type on the last checkout page.

I get the same error if I select the Pay by PayPal Express button from the first Shopping cart page.

the phpinfo from admin shows:
CURL support enabled
CURL Information libcurl/7.10.5 OpenSSL/0.9.7b ipv6 zlib/1.1.4

IPN Checked all OK

The error occurs in paypalwpp.php:
in the section for
case 'GetExpressCheckoutDetails':

Any ideas where I should start to solve this problem?

Many thanks
Chris