There were such kind of news always but, as I remember or know (don't pretend to fully informed), never so serious that this time. Never were written such big probable problems of bitcoin (as a product) and even such kind of divergences within the team of core developers of it. It was well know their divergence about the block size but this is only a problem. From the writing of Mike Hearn emerge a situation big of problems and deep divergences (which made him to leave the development of bitcoin after 5 years work on its team) which for sure can be reflected even at the actual situation and the future of bitcoin. The first sign is already happen. The drop of price of it in such amount within very few days is a direct result of this situation. Even for the moment the drop seems stopped everything told by Mike Hearn may cause even a more late consequence. It is not me who has talked or write but a 5 year developer of it. Let's hope that bitcoin will have the power to survive even this last attack.