JBoss Enterprise Web Platform 5.1.1 is a minor release. Minor releases aggregate the contents of prior patches and Cumulative Patches (CPs), and may add additional new functionality. Subsequent patches and Cumulative Patches assume the installation of the minor update that preceded them.

During the life cycle of a product's major version, Red Hat makes commercially reasonable efforts to maintain API-level compatibility across all minor releases and asynchronous patches, ensuring that, for example, JBoss Enterprise Web Platform 5.1.1 maintains API-level compatibility with JBoss Enterprise Web Platform 5.0.0, the initial release of JBoss Enterprise Web Platform 5. Possible exceptions to this rule include fixes addressing critical security issues.

With the release of JBoss Enterprise Web Platform 5.1.1, JBoss Enterprise Web Platform 5 customers should update to JBoss Enterprise Web Platform 5.1.1.

Refer to http://www.redhat.com/security/updates/jboss_notes/ for more information about the JBoss Enterprise Middleware Product Update and Support Policy.