I just installed 3.8.14. I am having problems with the shipping calculator. First problem - the "State" field does not produce a drop-down list. Second problem (Maybe related to the first problem?), if I manually type in a State name and type in a zipcode, the calculator returns values of $0.00 for the shipping cost. I am properly registered with USPS and I am pretty sure that I have everything set up properly, with values of weight for my products, etc.
I have switched to a plain-vanilla standard WP theme (2011) and disabled all other plugins.
Here is my sites URL