I was confused by the same thing, because you used to be able to change the country & see the GSP shipping rates on your listings, without going to .com, but as you say, now you just get that 'Check item description...' message. It makes you think that is what overseas customers will see, instead of the shipping price.

I don't know when this change happened. Maybe when they replaced the 'Postage & payments' page that used to be next to the 'About this item' tab?