I find the new trackpad drivers to be pretty horrible. It's so sensitive that it picks up all the minor movements. It gets really frustrating because whenever I use my thumb to press down the trackpad, the trackpad picks up all those mini movements causing the cursor to shift a little everytime I press down the trackpad. This makes double clicking pretty hard. On top of that, tap-to-click works better than it used to, but it seems to still suck.