About two months ago, I purchased a Macbook pro retinaMacBook Pro Retina, 13-inch (model MF840LL). Recently, I have noticed a quiet rattling noise when doing something performance-intensive (some webpages in Firefox, for example).
What is causing this, and what should I do about this (if anything)?
I also have a Speck seethru case on the computer - could the case be rattling against the computer?