UPDATE: Scala 22.214.171.124 has replaced 2.9.0 as it hot-fixed several important bugs.
We are happy to announce the release of the new stable release of the Scala distribution. The new Scala 2.9.0 final is available from our Download Page. The Scala 2.9.0 codebase includes several additions, notably the new Parallel Collections, but it also introduces improvements on many existing features, and contains many bug fixes.
def p[T](coll: collection.GenIterable[T]) = coll foreach println; p(1 to 20); p((1 to 20).par)