When I set up the USPS shipping module with the US shipping zone (United States, all zones) it works fine, but when I switch the shipping zone to worldwide (all countries, all zones) it does not work, i.e. the Estimate Shipping Costs table does not display the USPS options. I have installed the USPS Patch May 12, 2008 (http://www.zen-cart.com/forum/showthread.php?p=556048) but it still doesn't work.
I am running Zen Cart v1.3.8a, it's a fresh installation.
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