A release for GNU/Linux with similar features will follow soon.
Development is under way to standardise a IRC services protocol.
Update 15/Apr/08: This version has now been superseded by 2.8.7a.
See this forum post for a list of changes or to leave comments. See this forum post for a list of changes or to leave comments.
The most notable improvement is probably the moveable components, that is, you can move the userlist and tree around to different positions with the mouse [youtube video].
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