Hi. I recently bought a Macbook Pro and it starts worrying me that it makes a 'click' sound. It's done it all the time but now I start worrying whether or not it's normal. It doesn't do it all the time. It comes now and then. It's not loud. I've tried to record it and you can hear it by clicking here. I hope someone can help me figure out whether or not I need to return the Macbook.