When going through the installation steps in the GUI installer, there is a link to the release notes on one page. The links are for EAP 4.2 and 4.3:

http://www.redhat.com/docs/en-US/JBoss_Enterprise_Application_Platform/4.2.0.cp08/html-single/Release_Notes/index.html

http://www.redhat.com/docs/en-US/JBoss_Enterprise_Application_Platform/4.3.0.cp07/html-single/Release_Notes/index.html

But in JBPAPP-2772 I noticed that we started to use a different scheme for the version name in the URLs. So it should should be:

http://www.redhat.com/docs/en-US/JBoss_Enterprise_Application_Platform/4.2.8/html-single/Release_Notes/index.html

http://www.redhat.com/docs/en-US/JBoss_Enterprise_Application_Platform/4.3.7/html-single/Release_Notes/index.html