NY Times Corrections page
The corrections on the corrections page from April 5, 2007, vary greatly in importance, in my eyes. A few of them are about pictures and misidentifications, others are more important, like the one correcting that schools in New York City would get a monopoly on playing fields, whereas the original story said the city would. It seems that a lot can go wrong in a story and still be published due to the immediacy factor in news. It's comforting to know that if and when I make a mistake, it won't be terrible because a correction can be put in the next day's paper.