Quote Originally Posted by sadie View Post
Thanks, but I've always had the zip code in that section. That's not the problem, everything was working until the new rates. It has something to do with the new code, age of my store and php version. I'm not sure why yours is working and mine is not ... both older stores, same php version. I'm just going to take it offline, and try to get to the massive upgrade next week when I have time.
Turn on the shipping-module's debug and give the shipping-estimator a try.

That'll create a SHIP_usps*.log file in the site's /logs directory that will let you know what the issue is.