I have a unibody MacBook Pro purchased in October. This morning I noticed a spot on the screen that hadn't been there before. After looking at it closely it appears to be dust. I had this problem with my MacBook as well. Apple changed out the MacBook for a new one but this Pro is several months old. I was wondering if they would change it out or send it in. I have a 500GB hard drive in it and 4GB of ram that I added. Should I take them out and go back to stock before I take it in? Thanks for the opinions in advance.