Found leftovers from Rising Water gimmick.
I don't know if I have the latest experimental editor, but it is a 1.47 editor, downloaded at some point after the player was updated.
(http://i.imgur.com/B4p0sAM.png)
You don't have the latest, as evidenced by the lack of a "Rotate" option for objects. Still, I haven't done anything about this even in the latest one, so thanks for pointing this out.