I have a Thinkpad E420, which has the standard nipplemouse + 3-button 
setup. On Windows and Linux, the middle button acts as a button if I tap it 
and a scroll wheel (controlled the nipple) if I hold it. When I run 9front 
in Qemu, however, I get neither behavior. Is there a way to make Qemu see 
it as a normal middle-button? 9front is obviously pretty unusable without 
one.