E-i-e-i-o

An article on Saturday about fund-raising efforts in New York by Senator Barack Obama misspelled the surname of one of President John F. Kennedy’s closest advisers, who introduced Mr. Obama at a fund-raiser. He is Theodore C. Sorensen, not Sorenson. The error also appeared in an article in The Arts on Feb. 22 about books written by candidates, including “Profiles in Courage,” which then-Senator Kennedy wrote with guidance from Mr. Sorensen. (The Times has misspelled Mr. Sorensen’s surname more than 135 times in headlines and articles during the 50-plus years he has been a Democratic adviser and well-known author.)

Corrections — The New York Times

No one noticed for 50 years? Not even Sorensen himself?