Yep, that happened to me as it turned out (I had not received it when I posted). Rough jagged silver edges as well. Had to argue back and forth a bit for a free replacement without having to pay again for shipping but finally got them to see sense. Replacement fixed the problem.
Push comes to shove, a small spray can of black paint would have fixed it (labels are not really needed, given shape and color of sockets, and it would look much better without them on the top).
Alternatively, the board and front and back panels can be reversed to resolve the problem, as it is not necessary to screw the board to the bottom of the case (the RCA sockets mounted in the back panel alone will hold it, as it is very light).