I have a similar problem, only it applies to domestic shipping.
I am running ZC 1.38a
When using the Priority Mail option, ZC keeps returning rates based soley upon weight and zone. It WILL NOT return rates based upon Priority Mail flat rate boxes (medium, in particular). MOST of my products will fit into a Small Flat Rate box, but I prefer to use the Medium to provide adequate packing (for jewelry).
I installed the new USPS shipping MOD, but no change. Am I missing something? Any suggestions?
Thanks
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