What's different in GlassFish v2 UR1?

Sun Connection, support for AIX, and many bug fixes.

What's new in GlassFish v2 UR1 describes in greater detail what's included in the release, as does the
release notes. Also see the v2 UR1 post on The Aquarium.

The Sun-supported counterpart to GlassFish v2 UR1 is Sun Java System Application Server 9.1 Update 1. For a good description of the differences between GlassFish and the Application Server, see How does GlassFish V2 differ from the Sun Java System Application Server 9.1?