Double full screen slideshow buttons

It seems that the new slideshow view has a bit of a problem. If you take a non-locked gallery like this one and set it to the slideshow view, you will see two buttons for a full screen slideshow. One is called Slideshow, the other is called Full Screen. That seems like a bit of an oversight in the new slideshow view. FYI, the same thing happens in the www.smugmug.com form of the URL so I don't think it has anything to do with customization.

Here's what it looks like on a cmac.smugmug.com gallery.