“Moments after Silicon Valley blogger Matt Marshall saw a New York Times story saying Microsoft Corp. was in talks to acquire Internet marketer Claria Corp. last month he raised questions about it. Mr. Marshall, writing in his Web log, called the report ‘strange’ and mused about whether the paper had been led astray by an anonymous source. A blogger critiquing the mainstream media is hardly unusual. But Mr. Marshall is also a reporter for the San Jose Mercury News who had been following Microsoft and Claria as part of his normal beat.”