I had trouble with the screen going blank when I updated to osC 2.3.3.2 (now updated to 2.3.3.4) with the screen going blank after trying to place an order using the basic install of PayPal Express.
I replaced that module with the PayPal Express Checkout w/ Item Description & Total amount = addons.oscommerce.om/info/8271. This seemed to work as the order information went to PayPal and processing looked fine until completion when you hit continue. All I get is a blank screen when it comes back to the store for confirmation. I'm not sure how the token, payerID information is supposed to be handled since I never had this trouble before. Any diagnostic help/advice would be appreciated. Info below just shows that token & payer ID is there.
http://www.notjustfudge.com/catalog/ext/modules/payment/paypal/express.php?osC_Action=retrieve&token=EC-2G445052B5035693P&PayerID=VYVAKZBTXV262&payment_method=paypal
or
http://www.notjustfudge.com/catalog/ext/modules/payment/paypal/express.php?osC_Action=retrieve&token=EC-9SY289631P285100M&PayerID=VYVAKZBTXV262
Payment is not being processed. The order is not placed. No eMails sent. No error message received.