Hello! Sorry if this is similar to like a billion other threads on here, but my 15" Retina MacBook Pro refurb that I got in June has started showing signs of image retention. I hadn't noticed it before, but one of the first things I did was check what screen panel I have...just my luck to get an LG! It doesn't seem too serious, just things like the edges of a Safari screen still being visible against the dark blue galaxy background when I close it. I also did the checker board screen test last night and the squares were definitely still visible when I switched to grey. I heard people saying that Apple won't just replace them, they'd want to test it themselves and then see if it fits into a category of "not normal." When was image retention ever a normal thing? Also, are they likely to offer me a replacement or will they want to fix the screen? I'm still well within warrantee so I presume any work would be free?