You can hardly place curtains anywhere anymore. Used to be they could be freestanding, placed anywhere in a house, didn't even have to be against a wall. Now I get the message "You cannot build that there" more often than not. Can't place out in the open, can't place in the space between two walls, can't place over an archway, can't place over a window... THE ONLY time I've had success in placing a curtain recently is against a solid wall. They are just behaving very strangely all of a sudden.