Yes, this does happen in the media once in a while and when an honest mistake they issue a correction. Maybe you have seen corrections before. Are you trying to make a big deal out of this?
I know a very few people who think the mass media is a total bunch of liars and my retort is 'if there are so many lying reporters, producers, journalists, etc then you would see many of them getting fired and being sued and losing big lawsuits.' And as I follow up I ask them how many reporters do you see getting fired, top news execs, etc.
Yes, you are going to see a Dan Rather once in awhile where he had an agenda against George Bush, a fellow texan, and Rather went out of his way to publish some info about Bush's National Guard record that then seemed to be 'shot down' , excuse the pun. Rather got dumped or was forced to step down or leave CBS.
I think the Guardian had a top reporter get sacked because it was proved that some of his top reports were fabricated.
I think compared to the Swift Boat liars, etc this post of yours is a non-story.