1. That he points out a problem with mainstream journalism (failing to vet sources), not one with citizen journalism, as he says. (Note: citizen journalism has that problem too, but not here.)
2. His definition of "citizen journalism" is far too wide, in my opinion. Moore isn't a citizen journalist. She's just a person who happened to be talking to her friends about an event as it happened.
If we accept the "everyone is now a journalist" definition that Carr seems to use, then journalism becomes something of very little value. Journalism is removing the signal from the noise, and his first example (Moore) demonstrates a failure on the part of trained journalists to do that properly.
His second example (the video of the Iranian protesters death) is tragic, but again, not a failure of journalism or journalists. It's a failure of human decency, perhaps (and one that's certainly debatable)... but that's another topic altogether.