It seems these two errors might be related to the same thing so here goes one bug.

Have unity personal and open build settings window
Observe: errors in console "unable to load icons/samsung..." (same error for each platform) and missing platform icons in build settings window.
Note: you can clear errors and they will not re-occur when opening build settings again. You get the same error by importing one asset through the menu point though not by dragging it into projct.

Have unity pro and open build settings window
Observe: Argument exception errors and black build settings window
Note: build settings window is not usable no matter what you do