When a new product is developed with a completely modified hardware design, usually identified with “Review A”, after all, it is the first of a generation. The new MacBook Air, for example, cannot be classified like this, since it is basically the same design as the previous model; j the new MacBook Pro with Retina display can be considered a “Rev. A ”, since its construction was completely rethought by Apple.
As much as tests and more tests are performed, it is not uncommon to see these hardware present some kind of problem. According to an Apple Support Communities topic, some users are complaining about a known problem with plasma TVs, titledburn-in (marks that are printed on the screen when the same image is shown for a long time, for example, the logo of a TV station in the corner of the screen). In the case of the new MacBook Pro, any still image for more than 20 minutes is printed:
Notice the marks on the image credit screen: One More Thing.
Such a feature is not common in LCD screens with IPS technology, however, if you are a happy owner of such a machine, it is good to make sure that everything is fine. If not, try to seek Apple support according to the topic, the company is exchanging defective units for new ones without question.