The DOT report on complaints from February 2015 came out a few days ago:
http://www.dot.gov/sites/dot.gov/fil...prilATCR_1.pdf
Take a look at page 41. This was far more widespread than I had realized-- there were over 15K DOT complaints on the error fare. Even if you assume that each complaint was only for one ticket (doubtful), and everyone who bought a ticket made a complaint (also doubtful), that's an enormous number of people impacted.