This problem was giving me fits after the WP update to 3.9. Had to do a work around on each post in order to compensate for this coding dilemma in each heading tag I needed to center. Can’t tell you how relieved I was to discover this thread and find out this solution worked for me, as well. Someone should post an article about this situation as I’m sure there are others out there struggling needlessly like I was. Thanks
https://www.commonsenseforlife.com