I know there are other threads about this. But I think it is serious enough flaw in AP, that I think everybody should be careful (Trust me, I am not a short seller. I own 3 Teslas). Situation: When autopilot is engaged, it somehow sees some shadows/images, and it brakes pretty hard even though no car is in front of you. It does not come to complete stop, but it will go from 65-70 to 45 pretty quickly. Conditions: Typically for me it has been driving in the dark (evening or early morning) and going under an underpass. I am not sure if others have seen this during the daytime or other conditions. Please take notice of this and be careful when engaging autopilot. I have already been rear-ended (not related to this issue), but I can see how this bug can create a hazardous situation where somebody behind could rear end you. I hope Tesla takes note of this and fixes it soon....it can be fairly dangerous. In the meantime, I have taken to driving again without autopilot until the next update.