COVERING UP FOR THAT COVER A rare Paul Krugman correction in the New York Times? Not quite. Today's corrections section states, "An article last Sunday about the differing covers on the American and British editions of a book by Paul Krugman, the economist and Op-Ed columnist for The New York Times, Page, referred incorrectly to a caricature on the British version. According to groups that distribute the image, the drawing of Vice President Dick Cheney, with the words 'Got Oil' on his forehead and a dark mustache, was intended to evoke the 'Got Milk' advertising campaign, not to suggest a...