I notice that sometimes when I close the screen, I hear a light creaking noise. So I felt that black bar or w/e behind the keyboard and I could press down on some areas, and it would make a noise. Is this normal?
This is what I am referring to:
http://i31.tinypic.com/3013tkh.jpg
This is what I am referring to:

http://i31.tinypic.com/3013tkh.jpg