Wait, there are chests now? Last I checked, it was just a 10 brick high version of the Default Maze in the dark, with the exits boarded off, and that random creepy face that would give you a zero-minute ban if it touched you (also, it doesn't appear much if you're walking around, or so I hear).
Also, if it shows up as a white box for you, you need to turn on "Download Textures".