“On June 17, 2009, Mashable made a mistake. In a report about the volume of Twitter activity surrounding the #IranElection movement, we accidentally used a “b” instead of an “m,” inflating the number of total tweets one thousand-fold…The great thing about the web is that we were able to fix the error within minutes of the article going out. “Billion” became “million,” our readers had the correct information. No big deal.
Except that also within minutes, Ann Curry of NBC News, a very highly respected journalist with an international following, had tweeted our original, incorrect version to her followers. Her repetition of our mistake lent legitimacy to an incorrect stat.”
Mashable reflects on Why New Media Literacy is Vital for Quality Journalism.

