Previously, I had opened a bug regarding shipping errors.
So that if one shipment calculation method fails, nop will continue past the error and the shopper can still select a rate.
from 1.6 release notes "Continue shipping rate computation on error with multiple providers"
In 1.8 this bug has crept back in.
We calculate shipping with FedEx and USPS, we are in the USA.
We are getting this same error when trying to calc from USA to UK addresses ("The length of the destination state or province exceeds the limit of 2 characters.") https://www.nopcommerce.com/boards/t/3172/fedex-as-the-shipping-provider.aspx
Regarding the error message, it would appear that nop is not sending the correct state or province abbreviation to the FedEx server.
When the FedEx module barfs nop doesn't continue on to the USPS calc which it should.
This is the bigger problem, because I end up losing a sale.
-Mike