INTERNATIONAL

Because of an editing error, an article on Tuesday about federal elections in Canada described incorrectly, in some copies, the political career of Michael Ignatieff of the Liberal Party. He was making his debut as party leader — not as an elected politician.

The article also misstated in some copies the previous record number of seats won by the New Democratic Party, which broke that record by winning 105 seats and finishing in second place. It was 43, not 45.

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An article on Tuesday about the compound in Pakistan where Osama bin Laden was living before he was killed in an American raid omitted reporting credits in some copies. Ismail Khan contributed reporting from Peshawar, Pakistan, and Adam B. Ellick from New York.

NATIONAL

An article on Thursday about the disposition of the criminal cases of two former students from South Hadley, Mass., in the bullying of Phoebe Prince, who committed suicide in January 2010, misstated the plea of one student. Kayla Narey “admitted to sufficient facts” for a harassment charge; she did not plead guilty. (If she satisfies the conditions of probation, the charges will be dismissed.) 

 NEW YORK

An article in some editions on Thursday about an auction of Impressionist and modern art at Christie’s in New York on Wednesday night reversed the identities of the buyers of the two paintings that sold for the highest price, $22.5 million each. The Manhattan dealer William Acquavella bought the Vlaminck landscape “Paysage de Banlieue;” a person identified by Christie’s only as an American buyer bought Monet’s “Les Peupliers.”

BUSINESS

An Associated Press article and headline on Wednesday about Pfizer’s quarterly earnings report misstated the company’s revenue forecast for 2011 and 2012. The company maintained a forecast that it had issued in April; it did not lower it.

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Because of an editing error, a picture caption on Thursday with the Reuters Breakingviews column, about the initial offering of Renren, a Chinese social network, and the bailout of Portugal, misidentified the person pictured in some copies. He is José Sócrates, the prime minister of Portugal, not Joseph Chen, the chief executive of Renren.

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Because of an editing error, The Trade column on the DealBook page on Thursday, about the Federal Reserve’s banking regulatory role, referred incorrectly to Better Markets, whose chairman, Dennis Kelleher, commented on the matter. It is an advocacy group, not a lobbying group.

SPORTS

The baseball roundup on Monday by The Associated Press erroneously attributed a distinction to the Boston Red Sox pitcher Tim Wakefield. In making his first start of the season on Sunday, Wakefield, 44, did not become the oldest pitcher to start a major league game since Roger Clemens started for the Yankees in 2007 at 45. Last season, Jamie Moyer of the Philadelphia Phillies started a game at 47.

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The On Horse Racing column on Tuesday, about the writer’s difficulties in picking a Kentucky Derby winner, misstated the year Barbaro won the race. It was 2006, not 2003.

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An article on Saturday about the second day of the N.F.L. draft misstated the position played by the former San Francisco 49er Dwight Clark, who announced the team’s second-round pick. He was a wide receiver, not a tight end.

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The On Soccer column on April 28, about a match between Real Madrid and Barcelona, misspelled the surname of Lionel Messi’s teammate who assisted on one of his two goals. It is Ibrahim Afellay, not Affelay. A correction in this space on Monday misidentified the winner; Barcelona, not Real Madrid, won, 2-0.

OBITUARIES

An obituary on March 25 about the playwright Lanford Wilson misstated the name of the publication in which Mr. Wilson was quoted discussing his early days in New York. It is Current Biography, not Contemporary Biography. A reader alerted The Times to the error on Thursday.

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