it's a small detail yet might be useful. I find it annoying that a failed Enumeration#withName call tells me nothing about the argument supplied. What about a small change:

   final def withName(s: String): Value = values.find(_.toString == s).getOrElse(
      throw new IllegalArgumentException(s"No value found for $s")

or to stay compatible

   final def withName(s: String): Value = values.find(_.toString == s).getOrElse(
      throw new NoSuchElementException(s"No value found for $s")

however I'm curious if anyone is seriously catching an NoSuchElementException :-)

I've posted this idea on the scala-internas as well:
https://groups.google.com/forum/#!topic/scala-internals/r6nq3s1SZds