Is this grey band/bar normal?

I got this on my imac. Sorry I have not figured out a way to attach pictures, here's the link to my post on macrumors.
picture:
http://att.macrumors.com/attachment.php?attachmentid=215654&d=1266776724
post:
http://forums.macrumors.com/showthread.php?t=867965
It is a grey horizontal blur band/bar 2 to 3 inches from the bottom of the screen and it is probably 1 inch thick. When I boot my imac I can clearly see this. The attached picture is not a best shot however if you are patient you should be able to spot it. It is really more pronounced than the picture. I searched other forums and looks like some people have the same issue. I do not want to get another replacement if this is a common issue. Please let me know your thoughts and thank you all in advance.
xingstar

There is nothing wrong you are simply seeing the space of the window behind the Dock and your desktop. See, you can see it on my system too:

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Did you try the suggestions mentioned in the KB Article? Tried the suggestions mentioned in the "More like this" section over here?-------------->
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AASP
International AASP’s & Other Services
AASP's Outside of the USA
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Hi cybertoof,
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http://support.apple.com/kb/TS2570
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ul10 wrote:
I'm using the most recent Photoshop
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