1. Internally adding this would be nice
2. The mode +a is not part of the official IRC protocols specs to my knowledge.
3. Not sure I like this idea. First off, never seen it in practice. Secondly, it's only 25-30 pixels in height (usually)... What are you going to shrink it to, 5? Something needs to be visible (unless transparent) for you to hover the mouse over. Now, this suggestion for the treebar is a GREAT idea (except, popping up the treebar over the MDI area and hiding when the mouse focus is lost.
What I would like to see is script based way to remove the menubar and title bar, then place mIRC in to "full-screen mode", and the reverse.
