I heard a funny(?) story the other day: apparently the new euro coins are minted from a high-nickel alloy, and nickel allergy is one of the most common allergies. The article I saw predicted that many shop assistants & bank tellers (those handling currency all day) would come out in painful lumps. Is there any truth in this, or is it just another of those euro-myths (euro-mythtakes?)? What are US nickels, the coins, made of?