What is their legal theory though? Have courts found that journalist must retroactively update their previous stories based on new information? Even if they have, is that defamation?
It's quite funnny that a company arguing "we disclosed because we filed an esoteric (in terms of public disclosure) security filing" to demand that Krebs retract his previous story; maybe if he opens the front door and shouts "Sorry!" it would meet their level of communication?