retina macbook pro screen burn?

Have you tried searching on here? There are many, many threads about this.
"Burn-in", "image retention" (IR) or "ghosting" might give you some answers...
Here's some threads to get you started:

https://forums.macrumors.com/search/?searchid=31197559
https://forums.macrumors.com/threads/1422669/
https://forums.macrumors.com/threads/1482143/
https://forums.macrumors.com/threads/1477580/

Not all LG screens present this problem, though.

Hope this helps.

Uplift said:

So nobody on here is suffering this?

I've been on the Apple forums and there is a 300+ page thread about it, looks like anyone with an LG screen is getting this and people are still buying them today with this issue so it hasn't been fixed by Apple.

Click to expand...

There are many existing threads.

Apple updated their support page to acknowledge it a while ago.

http://support.apple.com/kb/HT5455

NEC has published a number of white papers on the topic. Unfortunately I can't locate any of the good ones. This is sort of an older issue resurfacing, as it was much more common on older displays. Most people experienced it further into the life of the display, and attempting to fix it was annoying. The commonly accepted method was to bring up a white screen and leave it that way for an extended period of time. My opinion is if you're within the return period, return it. Otherwise they will likely send it in for service with or without arguing (not sure of their stance on these).

If it bothers you, return it or change it

However, I will say, that's its a common problem among IPS panels and technically looks within spec. I'll (as per usual) get shot down by the MacRumors Apple-hating gang for saying this, but it's the truth! (last time I posted this on one of these threads they called it complete ******** until I posted a list of links )