Im not sure... maybe different mouses do different things....
But for me it works normally...
Whatever key I map to third mousebutton it works in every program (including mIRC)
Though there is one thing that makes me wonder sometimes...
When I dont assign no key for wheel/third button then it works like standard autoscroll (there appears little arrow and the page will scroll automatically....) this function works currently only for nicklist.... not for the actual channel 'pane'
