i get this message when trying to go through check out 'We are unable to find a USPS shipping quote suitable for your mailing address and the shipping methods we typically use.' I read somewhere about a jan 2 2011 update, but have no idea how to find out if i have that or where i would update it, it looks like i have version 1.3.8a. usps says all is fine and set up on their end but still not working on my end.
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