It would be wonderful to declare that as crossword editor I never let an error get into a published puzzle in the New York Times.
Wonderful, but, sadly, not true.
Despite careful checking of every puzzle, and testing and rechecking by a crack backup team (currently six people - Frank Longo, Nancy Schuster, David Rosen, Evie Eysenburg, Ellen Ripstein, and Martin Herbach), sharp-eyed Times readers catch me in about a dozen mistakes a year. And they aren't bashful about letting me know.
"New York Times Crossword Goofs,"
Word Ways: Vol. 40
, Article 26.
Available at: http://digitalcommons.butler.edu/wordways/vol40/iss1/26