Alex,
I am finding that the gift wrap charge (ё3.50) is being shown as a discount in Paypal instead of an additional charge.
Although overall pricing showing Ok in Xcart order pages and cart.
Any Ideas?
Also raised this as a separate bug
http://forum.x-cart.com/showthread.php?t=67326 with a bit more information and a potential fix as it appears that gift wrapping is missing from both order total calc and discount calc in file payment/ps_paypal.php
Regards
Roy