CS4 banding, pixelated images

Up until just a few hours ago, Photoshop CS4 was working fine - out of nowhere I began to notice an extreme and "step" banding around soft brushes and gradients where any imaged placed on the canvas was instantly pixelated.
The settings were RGB 8-bit 300dpi on a 600x600p canvas, I am almost certain it isn't my screen as I can see gradients in other programs (fireworks, as well as all internet browsers). I almost always work under these settings and have never experienced a problem like this, I've reset my preferences, switched between modes, and I've never has access to my GPU settings in PS so that can't be it. I should also note that it is visible when printed.
I've even updated CS4, what can I do to fix this.

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RokkyTen wrote:
http://oi55.tinypic.com/2vhvwa0.jpg
I'm not seeing excessive banding in the image you posted. No more than should be expected for an 8 bit grayscale image. That actually eliminates a lot of suspects.
That leads me to wonder if it's your monitor settings or video card.
Have you rebooted since seeing this problem?
What's changed since it worked?
How many bands do you see in this image:
Does the following seem smoother than what you see?
-Noel

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Message was edited by:
aaasdf

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