Hi, I just got my MBP 3 days ago and I got a stupid question about my MBP's Track pad. Is an MBP suppose to respond to tapping/ double tapping on the track pad just like how any PC laptop does? I stuck a Track Pad Firm (bought in Apple Store) on my MBP within hours I opened the box, and so I didn't check if my MBP responds to tapping/double tapping without the trackpad firm. With the track pad firm on, my MBP's track pad doesn't respond to any tapping at all (but I have no problem with scolling). Thank you for your help!