So fences are back in for the latest revision. The picket fences are working fine (you can see them at top-right of picture), but placing the fence gate has some issues. As you can see in the image, the parts of the gate are all over the place. Even the end-posts are 5 or 6 blocks away from where the cursor is pointing. When you click, the fence gate will place where the cursor is.
Also, when the gates are placed, villagers are not pathing through. I have a farmer in a fenced off area with a couple of picket fence gates. Nobody will come in to carry away the food he is gathering unless I ask them to remove a fence piece first. Then they will come in and get the food straight away.