USPS appears to have modified the names and functionality of their realtime shipping especially for international shipments. StoreSecured staff detected errors occurring on some realtime shipping transactions, especially those for international shipments starting at 2am Sunday January 2nd, 2011.
StoreSecured has updated our handling to support these new rate names and functionality for USPS international rates and all rate prices are being returned as normal.
We urge all merchants using the USPS realtime rate functionality to review your list of restricted rate options immediately. It appears from our investigations into this issue that USPS has added several new service names and modified other rate names. Unfortunately at this time we do not have a list of any rate name changes and never received any notice from USPS regarding these changes. The changes were detected only because we started to see differences in the data returned from USPS last night.