Previously the world map only mapped objects 400 meters and below, so you could put skyboxes over 400 meters without having them show up. I liked that because it let me avoid marring the large scale terraforming of my builds with buildings, and some people probably would prefer their skyboxes weren't revealed to any yahoo teleporting on the Map.
Now it's showing everything to 768 meters.
Is this change permanent? I sure hope it's just an oversight.