This release is to fix a bug in the online checking code for GSD. It also introduces basic support for multiple languages. The language part is not a major part of this release, and will be rolled out fully (front-end wise) for 0.6.1.
Admin CP language support is planned for future versions as it requires a much greater amount of translation and code changes.
If you are updating from 0.6.0 please run the following commands on your database, and upload the fresh files. The installer does not need to be re-run if you currently have 0.6.0 (RC2) or higher.
ALTER TABLE usersADD COLUMNlanguagetinytext NOT NULL AFTERpassword``
INSERT INTO settings` VALUES('default_language', 'en')`