Mediagazer: Pranksters insert ‘apology’ letter into copies of New York Post (Andrew Beaujon/Poynter)

3:40 PM ET, April 22, 2013

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Ali Velshi / Quartz:

Ex-CNN anchor: Twitter is merciless when media lag, ruthless when they're wrong — For a time, Gabrielle Giffords was dead. So was Newtown, Connecticut, shooter Adam Lanza's father. Or maybe it was his brother in Hoboken, New Jersey. All three, as we now know, are alive. Two of them weren't even shot.

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David Carr / New York Times:

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Mackenzie Weinger / Politico:

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Bloomberg:

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Jim Romenesko:

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Sam Biddle / Valleywag:

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Amy Chozick / New York Times:

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Andrew Beaujon / Poynter:

Pranksters insert ‘apology’ letter into copies of New York Post — The art and culture site Animal inserted a letter purporting to be from New York Post Editor Col Allan into some copies of the paper Friday. A video outlines the prank: — “This week, the New York Post has acted recklessly …

Chloe Albanesius / PC Magazine:

Reddit on Marathon Bomber Crowd Sourcing: We Were Wrong — Reddit on Monday addressed the controversy surrounding the Internet sleuths who crowd sourced the search for the Boston Marathon bombers, admitting that the effort got out of hand. — “Though started with noble intentions …

Discussion: reddit, Gawker, CNET, Boston Herald and TrustedReviews

Peter Kafka / AllThingsD:

Twitter Gets a Vote of Confidence — And a Big Check — From Madison Avenue — More momentum for Twitter's growing ad business - a commitment from a big ad buyer to funnel “hundreds of millions” of its clients money to the social network. — As the Financial Times reports …

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Andy Carvin / MediaShift:

ISOJ Keynote: Can Social Media Help Us Create A More Informed Public? — Here's the transcript of a talk I gave at the International Symposium for Online Journalists in Austin, Texas last Friday. We Messed Up Now as many of you know, I'm usually I'm not at a loss for words.

Discussion: MediaShift, Thanks:@mediatwit