Release notes for WebSphere ESB are available on the product support site as technotes.
To search for a specific item, enter a search term in the "Search support for WebSphere ESB" section, and click Submit. Or, to see all the WebSphere ESB technotes, click on Technotes in the "Self help" section.
As limitations and problems are discovered and resolved, the IBM Software Support team updates the knowledge base. By searching the knowledge base, you can quickly find workarounds or solutions to problems that you experience.