I don't know if this is a bug, or if this was an intentional change? I have no idea.
But ended the dungeon that was the Cauldron of Slime, fought all the way to the end, it's not the hardest dungeon, but it's also not an easy brainless one either, Aboleths are obnoxious and the oozes are frustrating to fight.
Anyways, got to the very end with the Runic Chest and the Ore Vein and it was an Iron Vein.
Not even Arjale or Mithril. Iron.
I can understand not every epic dungeon can drop adamantine for balance purposes.. but Iron?
Please tell me this is some oversight? I can't report this as a bug because no one's confirmed it as such.