Looks like this style is pretty inactive/not updated, but I figured I'd leave this here. I've been using this style for probably three years now, and I love it, it's perfect for me. But in the last few months or so, it's stopped displaying the "X has left/entered the room" message. It just bumps the chat up a blank line. The message shows if I look in the chat logs, but not in the chat itself. The same explanation is basically here (http://trac.adium.im/ticket/15975) where I opened a support ticket. It's definitely this style, as I've changed to a different one now, and am getting the messages again.