I have the MBP Mid-2010 HR-AG 15" i7, and I installed the trackpad update when it came out. I loved the 3-finger dragging feature, which was such a great addition to my productivity, and I utilized it daily. For some reason, however, the feature stopped working. At first, when I would take 3 fingers and move them on the trackpad, the cursor would move as if I only put 1 finger on it. Then, I reinstalled the update, downloaded from Apples website. Now, when I put 3 fingers on the trackpad, the cursor stays still, but does not move the window. How can I re-enable the 3 finger dragging to work?