I have one panel on the bottom of my screen and it's set to autohide.  Most of
the time	it does hide itself when I move the mouse off of it but sometimes, it
remains stuck raised (I can't figure out what circumstances causing the
sticking).  Once it's stuck, I can get it to autohiding itself again but right
clicking on it and going to the properties dialog. I don't need to re-click
autohide or anything; just right clicking on properties seems to do it.