A player was asking if the light on top of his base could be deleted.
One of the Admins went up there, pressed the DEL key ("Delete Item?" appeared in the menu)
followed by "1". Instead of the light being deleted, it deleted the castle wall. (Whoops.)
We thought it would return after a restart but it hasn't.
We've pretty sure it was the InfiStar antihack that removed the wall (rather than an Epoch function).
Does anyone have any ideas how to restore the wall?
(I'm thinking the 3D Editor but can't test it as I'm in work.)