Today we noticed intermittent issues of getting: "Your order's details have changed. Please review the current values and re-submit." Reloading the page or changing the shipping method will let the order go through. Only recent changes were upgrading USPS from K11i to K11j (I typed in the password), sitemap from 3.99 to 4, GPSF from 1.0.0 to 1.0.1, and edit orders from 4.7.0beta2 to 4.7.0 released. It happens using cashiers check / money order, so not a payment module issue.

Guessing USPS API issue? Anyone else seeing this?