I have the late 2010 unibody MacBook and I just noticed that when I clikc at the trackpad it makes a weird sound. It's not like it was, it's louder and actually not normal. It's pretty noticeable. Should I be worried? The tapping and multitouch works great. Also when i click at the right lower corner, it almost makes no sound at all. This is quite weird and the worst thing is I don't have an Apple store in my country.