Some of the new features including screenshots are listed in this forum post.
Released a new version for Linux/Unix today: 2.8.4, which has similar features (ability to move the tree and userlist) to the Windows release a few weeks ago (see youtube video below).
Defend your honor and chat with players around the world.
A massive multiplayer social hangout where users from around the world can chat, dance, drive and create music in a fun 3d environment.
The problem does not exist if Firefox is your default browser.
A major new version of XChat for Windows has been released today: 2.8.7.