White dot (not dead pixel) on external LCD monitor.

Hi all,
I recently noticed a strange situation. I've owned a MacBook Pro 13" since October, and usually run it with an external Samsung T260 LCD monitor by MiniDP to DVI. I run the monitor at its full resolution of 1920x1200.
When I arrange the monitors so that the Samsung is on top of my MBP, there is a white dot about the size of a pixel approximately 3 inches from the left and 1/2 inch from the bottom of the screen. I thought it was a dead pixel, but when I move the external monitor to be on the left of the MBP, the white dot moves to 3 inches from the top and 1/2 inch from the right.
* The white dot does not appear when I arrange the monitors in any other configuration.
* The white dot appears when using MiniDP to VGA adapter as well.
* When I zoom using the modifer key+scroll method, the white dot grows bigger.
I've tried using the JScreenFix applet, but as I said, it doesn't look like a dead pixel.
Can anyone offer any other suggestions, that may involved poking around in the Video RAM space?
Thanks,
-Tony

Hi all,
Just returning to provide more information:
While playing around with my screen layouts, I found that the white dot is actually part of the menu bar graphic. I arranged my monitors and captured the screen to show the placement of the dot.
http://picasaweb.google.com/tonychung.ca/SonicTheme#5423207200689428946
I hope Apple is able to fix this in the next SW update.
Cheers,
-Tony

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