A handy resource for seeing what exactly is contained in a new release of software are the APAR fix lists published by IBM. They contain a list of every APAR that is resolved and you can click to get more information.

You can find them for:

• WebSphere Application Server 6.0.2
• WebSphere Application Server 6.1
• WebSphere Process Server 6.0.2
• WebSphere Process Server 6.1