The same thing happened to me a few weeks back. http://www.focusfanatics.com/forum/showthread.php?t=298670
1. Can you tell me the build date of your car.
2. How many miles on it.
Mine is 10/11 and has the 12B37 update too. It has 18K on it. I too did not notice any difference after the update, except for the roll back which no longer happens.