I am having a very annoying and weird cosmetic issue. After using my macbook for some time, as I use the trackpad button it makes two click noises - it's not just one smooth click. I was wondering if this was normal or not - It's odd because it only happens after I use the computer for a period of time - maybe the metal heats up and is hitting something? I've been careful so I'm 100% positive there isn't anything under my button the computer is under warranty so taking it in is an option, but I'm not sure if it will click or not when I bring it there - it's an on-and-off kind of thing. Anybody else have this problem? Any advice or help would be greatly appreciated.