hi guys, trust me I've been through more than 4-5 unit of unibody macbook pro, 13 or 15''. It will eventually end up with a little crack/creak or loud one someday. I wanna know am I really that unlucky that came across those 4-5 unit of it all end up with this problem. just post here if you too have a unibody macbook pro with a hinge that make noise when opening/closing screen. Apple should fix this, it is purely a design defect to have a low quality plastic hinge.