Newspaper publishers, including the mighty Gannett, have turned to the U.S. Postal Service to deliver their newspapers. It may be a mistake. Automated flats (meaning that you are doing part of the work for the USPS) are getting a 23% hike, while non-automated pieces are going up by 19.01%. Of course, the prices are lower for automated flats: the new basic rate is $0.492, versus $0.574 for non…