I've got a line of 3 teleporters in one of my houses on 4 different floors. The inside line on the left won't allow me to stand on it on any floor after that last patch. It will let me use it if I get there from another floor. I think the teleporters themselves are working, its just not letting me walk onto those tiles. I KNOW it was the last patch since we have used these teleporters for many years, and they have never given us any problems. I don't use this house all that much, but I hope they fix it.