If so, please review the Confluence 4.1 Release Notes for important information about this version of Confluence. Ensure that you have read the Confluence Knowledge Base.

Also, we strongly recommend that you check the upgrade notes for every major version of Confluence that you are skipping, since there might be specific changes between Confluence versions that could affect your Confluence installation. The upgrade notes for recent major versions of Confluence are accessible from the Upgrade Notes Overview page.

Finally, please check the Supported Platforms page to ensure that your Java version, operating system, application server, database and browser are supported for this release of Confluence. The End of Support Announcements for Confluence page has important information regarding supported platforms.