I recently upgrade a customers USPS to a release i found here dated I believe jan2-2011 and a couple of issues have appeared in the international shipping end

#1 its configured to show
First class Int pkg
Priority Mail International
Express Mail International

However at checkout the customer is only presented with the last two options. First Class doesn't appear. ( tested with an 8 oz package so it should)

Secondly if you choose Priority as the shipping method, express mail and its corollary rate show up in the shopping cart.

Thanks for your help
Steve