Normal Levels of Backlight bleed?

[Grathrax]

I got a new Acer 22" flat panel, and when the screen is all black (like dark during a concert, full screen terminal, etc) the center is lighter than the rest. Most of the googling says that black light bleed is around the edges. Is this normal? It is not AT ALL noticeable under any other situations. Other than that, I am really happy with it.

EDIT: should have put this in displays. I'm blind sometimes.