Problem with retina MBP display at low brightness

My new retina MacBook Pro has an issue with the display when brightness is anything below about 55%. It appears that certain areas of the screen don't dim, resulting in a pattern that ends up looking like "stage lights". At first I did actually mistake it for an intended graphical effect, as I first noticed it on the textured gray screen that appears during software update restarts.
Alas, it was not part of the graphics and is always there. When the screen brightness is increased above 55%-ish, it becomes invisible.
Here is a photo of the effect in low light with a flat white background:
I am taking it in to the Apple store tomorrow in the hopes of getting it replaced, but I was wondering if anyone else has seen this defect before. I am curious how common it is, as I can't find any discussion of it online so far.

You should also ask this in the MacBook Pro forum. This is the forum for the white and black plastic MacBooks that were discontinued in 2010. You should also post this question there to increase your chances of getting an answer.
https://discussions.apple.com/community/notebooks/macbook_pro

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Apple computers: Troubleshooting issues with video on internal or external displays
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Thank you for using Apple Support Communities.
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http://img14.imageshack.us/img14/7237/photojco.jpg
http://img26.imageshack.us/img26/6360/photo1eif.jpg
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Problem with retina MBP display at low brightness

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