The Groovy development team is happy to announce the release of Groovy 1.6.3.
You can have a look at the JIRA change log report for further details.
Groovy 1.6.3 is mainly a maintenance release.
Among other things, if you look at the JIRA issues closed, you'll see for instance:
You can download the Groovy distribution at the usual place.
Thanks to all those who contributed to this release: Roshan, Paul, Danno, Andres, Jochen, Alex, et al.!