My new MBP has been working extremely well, with one exception: some of the trackpad functions--namely, the three-finger swipe--are not working at all, or at least not consistently. The strange thing is, it was working when I first got the machine last week. But now, nada. I use Firefox as my browser and the two-finger scrolling works fine, but not the 3-finger swipe. Same goes for the pinch zoom. I just tested it with Safari though, and they work w/that. I would chalk it up as simply a Firefox issue, except that when I was trying to find a clue in Help and clicked the "open the trackpad pane of keyboard and mouse preferences," I got a message saying that the "trackpad tab is hidden b/c you do not have a trackpad installed on your computer." But I do see the trackpad pane. And on that pane, I see the "Ignore trackpad when mouse is present" checkbox, but not the box for "Ignore accidental trackpad input". Like I said, I'm otherwise very happy w/this computer and don't want to have to send it back just to fix what is now a minor inconvenience, but I know more uses for this feature are on the way so I do want to get it working. Any ideas what the cause might be? Thanks for your help.