I've noticed that every time I open up my AluMacBook the keyboard keys have left an imprint on my screen. It's not noticeable when I turn on my screen but when the MacBook is powered off the keys are clearly marked on the glass screen. I'm curious to see if this is common and if I should try to get my MacBook replaced because of this. Scarred that this might come to scratch my screen someday. Any help will be highly appreciated. Thanks