Faded circle on bottom right of Charge?

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I pulled down the status bar, and I noticed in the bottom right corner, a small faded circle.. I went in some other apps with the brightness turned down, and it was there too..

I took a screenshot and looked on my comp to make sure, and it's definitely a problem with the screen.

I don't have another device to take a picture of the actual phone, but I took a screenshot and used paint to edit in where the circle is, here's the pic:

http://i.imgur.com/GFggx.png


Anyone else see this? It's hard to see with brightness up, turn it down.