Logging has undergone deep changes. Now Cyclos supports logging to an external database, which is recommended for live systems. File logging is the default, and is also supported, but the log directory, maximum file size and maximum number of files are no longer set in the application’s configuration, but in cyclos.properties instead. So, when upgrading, either to keep logging to the current location or to change the log destination to an external database, you should see in the WEB-INF/classes/cyclos-release.properties file the available log settings.
All e-mails which are sent by Cyclos now use a template. It is a static content which can be customized per configuration. All previously customized translation keys for emails have changed, and the text have to be customized again, if needed.