hello,
just thought i'd contribute my issues with my macbook pro with retina display, which is experiencing what i feel is pretty heavy image retention.
following are my laptop details:
Model MacBook Pro (Retina, Mid 2012)
Codename No codename assigned.
Built Country This unit was built in China
Build Year This unit was built in the first half of 2012.
Build Week Week 23 (June) or week 50 (December)
i have an LG screen with the following code LP154WT1-SJA1, and a purchased my macbook pro a day after it came out in June.
i didn't notice the image retention until a couple of weeks after purchase - and at that time it was quite subtle. now however it has progressed to very noticable, and present after say 30sec after anything appearing on screen.
here are some (not so great) photos of the problem.


so far i have dealt with the issue by doing the following.
1) taken the laptop to genius bar where they ran a hardware test, to be told that there is nothing they can do about it. they would not offer an exchange, repair, or anything. they said only to wait it out in hopes for a firmware update that would alledgedly fix the problem. they suggested in the mean time to report it to apple care by phone.
2) reported my case to apple care, where the person said that this is a 'normal' occourance and emailed me a document with steps that i can action in order to reduce the occurance of image persistence. this document oultined mostly just to adjust my screen saver and energy settings. she said to call back in a week if the problem continues.
3) called apple care again to say that the problem is still there. this time the person i spoke to said that this is something that definately should not be happening and made an appointment for me to see genius bar this weekend so that i can receive a replacement macbook pro (hopefully).
while apple have been generally very friendly toward the situation, i am hoping to just have this issue resolved.
i will post again after my appointment this weekend. hopefully i will get a "perfect" screen, but if this is not the case i feel i will probably have to push for a refund, as i simply would not have a use for a screen like this one since i work in a purely photographic based industry.