As I noticed the right way, radix^^ has this bug too and will create a video!? Anyway - I thought this bug has everybody, but nearly anybody noticed it yet. For me it's really easily to reproduce, because I know it now. Second try: Do a double click on start orb, like open an app (start menu will open and close!) Move cursor down to bottom in orb-area (down - means really down, until you can't see it anymore)! Now orb moves up - isn't it? I have really no special system...Win8 x64 without WMC...changing settings in SIB, doesn't remove the bug - I have tried. It has to be a deeper bug in code of SIB. I have abide by this issue. If I choose mouse click in IntelliPoint for middle button, all worked as provided. So okay, there's not really a bug. It is a nice feature and I liked to use it, but for me it's beyond dicussion, to choose "click" as permanent middle button. So it seems I have to live without that feature. But as I said before..."click" on the middle is totaly oldschool and switches back to Win98. So I can't imagine, that many people who use Win8, use that behaviour on middle button. Maybe I am wrong...