Dark spots on screen?

[Darkjedi]

I just noticed this today, but there seems to be a spot on my screen where its darker than the rest. It's like the opposite of the Mogul's white spot problem. Anyone else have an issue with this? It's not noticeable until I have a white background. I've treated my phone pretty well and i haven't really subject the screen to any excessive pressure. My case is the magnetic one from the Mogul, but magnets shouldn't affect LCD screens anyway, not to mention I almost always put my phone in with the screen facing me.

// Its located a little to the lower right of the center probably a cm away.