I think I've got the same problem: http://ez.no/community/forum/developer/how_to_redirect_after_shop_checkout
so, no redirection to orderview after payment. just redirect to shop/checkout and blank inside.
have you seen that: https://www.sandbox.paypal.com/fr/cgi-bin/webscr?cmd=p/acc/ipn-info
I think It's a problem of notification. (have you activate it?)
(if some are properly processed it should be another pb...perhaps because of the timer in checkout.php) in my case server is no visible from the internet so ...no solution for testing it.. :(
for your problem I think It's a problem of tpn notification. You have to choose the 2 notification systeme for callback.
If you use tpn, when your browser is off, notification is lost.
take a look at this:(pdf manual 2nd link) https://www.sandbox.paypal.com/fr/cgi-bin/webscr?cmd=p/acc/ipn-info#
Well, it works fine on the dev server, and using sandbox on the production one not quite an option...
However, it <b>seems<b/> that it was a firewall configuration (the server has to be able to call paypal via http to verify that the notification is a legitimate one.