No, it's not moire pattern if that's what you mean?. This is straight and horizontial across the blue green background, looks exactly the same on the 17" Mitsubishi I have here as well. The 19" Iiyama I'm using is about 3 months old, both have diamondtron appature grill tubes. I can see it in the bimap image but it is quite a bit less defined than when the screensaver is running, some detail being lost in the bitmap compression I guess. The banding does look the same though.
Now I have a screen shot that shows it, (to me at least), maybe I should try looking at it on some friends PC's?
Stealth Cooling Project