Apple 30" inch Cinema Display pixelation problems

This is following on from a similar thread which is as yet unresolved the thread was called "30" with edge effects, green pixels?"
My setup is Mac Pro 3GHz Dual Intel (Brand New)
Graphics Geforce 7300 GT with a brand new 30" apple cinema display.
The problems is that pixelation occurs at random times and is only solved by changing the screen resolution down and then back up to its native setting. Is there a away to solve this problem. Someone on the thread mention above thought that it might be a syncing problem between the monitor and the card but the thread was never resolved and it is dated October. By the way I have check whether its plugged into the correct port and it is so any suggestions or bug fixes would be helpful thanks.

I've had my 30" display for 1 year running on an "old" G5 with an ATI Radeon 9600 Pro card (along with an "older" 20" Apple Cinema Display, the one with the plastic bezel). No problems with the 30".
A few weeks ago I got a Mac Pro with the ATI Radeon X1900 XT card. That's when I got the green pixelation problem. I thought it must be the card (since the monitor works just fine on lesser cards...), so I took the entire Mac Pro and X1900 to the Apple Store and hooked it up to one of their 30" monitors: no pixelation problems after over an hour of test running it with Aperture, Safari, etc. ****. I began to think that Apple has made some sort of change in the more recent 30" monitors to avoid the problem; either that, or my monitor is old and tired after only 1 year.
My 30" still runs fine when I put it back on the old 9600 card; it does ok (with only Minor intermittant pixelation lines) on the original (lesser?)card that came as base equipment on my Mac Pro; and it has the MOST pixelation problems with the BEST card (the X1900). Perhaps these 30" monitors can't handle all the data being sent by the more powerful cards? Is that possible?

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