Documentation for JIRA 4.2. Documentation for other versions of JIRA is available too.
Do not use in production
Beta releases should not be used in production environments as they are not officially supported.
Please also take note of the following information:
The following Beta releases are currently available for download. Your help with testing them is very appreciated! Please log the bugs you find on http://jira.atlassian.com in the "JIRA" project.