Top display artifacts - or just normal?

I was slouching in my chair today, to the point where I was looking from below up at my display and saw some weird dotted artifacts on my menu bar. There are two horizontal lines of dots that go on top and beneath the menu text all across the screen. They can ONLY be seen if you look from beneath upward. Here's a screen shot that shows it:
http://i61.photobucket.com/albums/h44/NYCMBP/screen.jpg
I tried booting from the DVD and it's still there and it shows when I use Grab to capture the whole screen too. Anybody seen this before and is there anything I can do about it? Not that it's a big deal, but if I could do something about it I'd do it.

I just connected my macbook to my cinema display and can't see anything there either. On the macbook, there are lines of jagged dots as I described above. On the Cinema Display it's just smooth with no jagged edges or dots at all.
So that would seem to indicate that it's the macbook display. Anybody else have this?

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