The latest release, Scala IDE 4.1.0, has been rebuilt on and repackaged with the latest Scala releases: 2.11.7.
It contains the improvements provided by the new version of Scala. For more details, check the Scala release notes: 2.11.7.
As usual, this build is available as an all-in-one bundle and through the update sites, for new installations.
Existing installations can be updated using the Help -> Check For Updates
feature.