The blog Report the Error has the funniest mistakes and corrections made by news organizations throughout the year. You should really read the whole thing - it's that hilarious - but here is my favorite one.
The American Family Association’s OneNewsNow site has a standard practice of using the word “homosexual” instead of “gay.” They even set up a filter to automatically make the change. This didn’t serve ONN well when a sprinter named Tyson Gay made news at the U.S. Olympic track and field trials. He suddenly became Tyson Homosexual when the site’s filter got a hold of an AP story: