I am having some problems regarding shipping with Marketpress.
I have been made some tests. I created an user and set his address to Brazil. The target country of the shop is set to USA. When I try to checkout the Marketpress change my country to USA in the shipping information page and gives the shipping costs to USA. I was expecting that some message appeared to advise me that the vendor was not shipping to Brazil and that I should contact him for more details.
Another problem. When I change the shipping method from weight based to any other, the weight of my products disappears. This should never happen. The weight of each product should remain stored sound and safe. Also there is no need to weight field to disappear when other shipping method different from weight based is selected.
Something similar happens with the shipping method tables. For example, I have fulfilled a table for the weight based shipping, then I select flat rate and my table was gone. This is less critical, in my opinion, but is also undesirable.