Re: International shipping weight is always off
USPS RateV4 and IntlRateV2 Shipping Module
This module has separate additional fee fields for domestic and international. Also allows other USPS options to be added.
We've been using it for over a year and are very happy since it allows us to filter/sort by product volume so that smaller flatrate boxes are removed as options when their volume is exceeded.
ONE CAVEAT, USPS Jan 2012 changed the word parcel/package in their tables and the module must be edited to make that change or International First Class packages/parcels will not work.
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