Assuming that it was not just an impressive mess-up in my version, it seems that Brass has been given new symbol, though I have no idea why this is. Brass now seems to be the only symbol to not have a dot in it. At first I wondered if it was some sort of misprint, but the line is clear and steady, not blurred at all, and it's not like there was some OTHER symbol that they accidentally inserted, as might happen with a typo. New art has to be specifically made, and we know that an artist created at least one other new Metallurgic symbol for that last chapter heading. So, any theories as to why Brass has changed?