Fixed a bug where PostCheck may return Michigan (and corresponding ZIP Code) for addresses in Minnesota. I’m not aware of this bug affecting any other states at this time.
Turns out this bug was reproducible in PostCheck 1.9.2 as well. If ‘Minnesota’ were spelled out as the state - under certain conditions ‘Michigan’ would be returned as the new state. I’m guessing that the USPS saw the ‘Mi’ at the beginning of ‘Minnesota’ and just ignored the rest in cases where there was a matching street address. (There’s lot of little issues like this with the USPS APIs.)
I hope this bug didn’t affect too many users or cause too many problems.
