After Creating or Editing a Thing whose Display Name contains Unicode, sends you to a bad URL

(Bug, Closed -> Fixed, Priority: High, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Names
Summary: Recipe: create a Thing with Display Name of "Здравствуйте". Save it. The Thing gets created correctly, but you get sent to a nonsense URL. Same happens when you Edit it.