chasonr/nethack-3.4.3-bugfix — pull request #3 by Bulwersator (2013-04-07 21:59:51+00:00)
Title: Colour of mithril objects is now correct

"Its beauty was like to that of common silver, but the beauty of mithril
did not tarnish or grow dim."

This is not listed as official bug - but mithril is the only material with clear colour that is unused (see gold, copper, silver).

As accidental bonus certain items will be easier to recognise.