Amazing finding by Google & academic researchers: neural networks used for image recognition are extremely brittle for specific minute disturbances in the input image. Multiple different networks failed to recognize the same slightly altered image that looks indistinguishable to the human eye.
Self-driving cars goodbye? On the other hand, now we can fool the hunter/killer drones Skynet will send for us...
http://cs.nyu.edu/~zaremba/docs/understanding.pdf