I posted this same thing when I first updated from 1.0 to 1.01 or whatever that interim patch was called. I believe it's related to the caravans. Personally I had hoped that restarting the game was going to fix my issue, as I loaded a save from 1.0 and that caravan never moved once I turned off auto turn, but the new caravan I started worked fine. Were you loading an older game after patching, or did this start as soon as you launched your initial caravan?