Although we deem this release candidate stable (it would not be a release candidate otherwise), Achievo 1.4.RC1 must still be considered a development release. For production environments, you might want to stick with the latest stable version of Achievo (1.3.4). If you want to help us stabilize 1.4 however, please try this new version.
This release contains many bugfixes, as well as many new features. An extended list is available in the CHANGES file in Achievo's doc/ subdirectory, including the names of contributors for each change. The major changes in this release are:
When upgrading from a previous version of Achievo, a database patch is necessary. The Achievo setup.php script can take care of this. After upgrading the software, go to the setup.php script in your Achievo directory, using your browser. Login as 'Administrator', with the password configured in the config.inc.php file, and follow the instructions on screen. More detailed upgrade instructions can be found in the UPGRADE file in the doc/ directory inside the Achievo tar.gz file.
This release contains many new text strings. Not all of them have been updated yet in all languages. If you would like to help update the translations for the final release, please edit the language file, update the missing strings and send the result to translations@achievo.org. There is a page on the Achievo site where you can see how many Phrases aren't translated yet. See also this small howto on the Wiki for instructions.