I have a 15" rMBP it is still under applecare and I noticed on the lower right side of the screen there is a brighter spot, it is around 2mm tall by 4mm long and is visible mainly on light coloured areas (like if safari is on that part of the screen for example. It seems to change shape and size a little if I press on the glass in this area. Any idea on what it is? Is this something apple will replace the display over and if so how long does that take?