am i just unlucky or something? apple replaced my macbook on saturday and today i noticed something wrong with my screen when i changed my background to a solid black one.There are these marks on screen, underneath the glass (I tried cleaning it). I don't know how this could have happened because I barely touched it the entire day and yesterday it was off all day. I'll try my best to get pictures, but for know does anyone have any idea what could have caused this? edit: there's no way i can get decent pictures if this but it's super obvious.