I have a vendor claiming that the Arduino Mega 2560 he shipped to us is a Rev3 although it is not indicated on the silkcreen. Simple question, are all R3’s marked as R3 or not necessarily? Visually the R3 changes are identical on this new board, as per arduino.org, with the exception of any markings that it is an R3. Believe it or not, this “minor” detail is holding up production.Thanks.