An update to the test server on 4.16.07 have brought some changes to the default interface. This patch looks to be part of Game Update 34. I have
posted a compare of the changes to the interface xml/graphics.
I suggest interface authors log on to the test server to make sure their modifications still work.
Sorry for the late compare.
Test Server 4.16.07 Patch Notes
Test Server 4.16.07 Interface Compare