Unfortunately I am adding my car to this list. After driving the car for four months with no issues, I had the dealer perform the update to the new software toward the end of June. Twice since then I have gotten the Stop Safely Now warning. The first time it happened (at 3391 miles), I dropped off the car at the dealer to look at it. Their technicians looked at it for two days, then someone from Ford supposedly checked it out remotely. No one could find any problems. 10 days later (at 3550 miles), I got the warning again. I have not taken it back because I am sure they will find nothing, but I did call my service advisor and asked him to make note of it in the vehicle's records.
Both times it happened within a mile of my starting to drive. Once it happened as I was coming to a stop at a red light. It took several minutes to clear the message and get the car going again, which was embarrassing as the cars kept coming up behind me. The second time I was doing about 40 miles an hour on a two-lane straightaway with no room to pull over. I was more prepared that time. I put the car in neutral and hoped I could coast far enough to get to someplace where I could pull the car in. I made it, but it was close.
I really like the car. It is fantastic for driving around town and taking short trips, and I really like charging up the vehicle at home instead of going to gas stations. But I dislike worrying about having the car conk out on me at any time, especially if I may end up in an accident because of it.
I hope Ford figures out the problem soon.