iPhone 5 light bleed issue?
I received my iPhone 5 direct from Apple (UK) on Friday. Everything works fine but yesterday I suddenly noticed a very thin (1 - 2 mm) overly bright bit at the bottom of the screen (above the home button). It's virtually unnoticeable when using the iPhone in portrait orientation but when I turn it to landscape, it makes the edge of anything grey (the keyboard for example) look quite light at the edge.
What I find strange is I can't really see it on a fully bright black screen (the normal test for light bleed), however on normal brightness (always less than half/quarter), it is visible on greys and certain other colours.
Could this be light leakage or something else? I've looked at getting a Genius appointment at my local Apple store but they are fully booked food the next week at least!
iPhone 5, iOS 6