I have just used Bootcamp to install Windows XP on my girlfriends new Macbook. It worked quite well but there seems to be one small problem. When the computer has been booted into Windows, then the next time OS X is started the "Tap to click" function is disabled. When I go into system settings to enable it, I see that the check-box next to "Tap to Click" is checked. So to make it work I have to remove the check-mark and the click it again - then it is enabled again. How can Windows cause this? It has me a little worried that it can have such an effect. To my knowledge the two systems should be COMPLETELY isolated from each other so the only answer must be that Windows actually changes some setting inside the trackpad that is remembered during boot. That is, a setting in the actual firmware or something? Anyone know if this is right and if something can be done to fix it?