Everything glowing suddenly

So i have 2 monitors plugged into my computer on the same graphics card, one is analog(VGA) and the main one is digital (DVI).
after being on sl for a few hours, or sometimes a few minutes, everything in sl will glow on the digital screen. i move the sl window to the other screen and it appears normal. i even moved to window to middle so it overlapped on both, everything glowed on the digital one, and was normal on the other one except right at the edge of the analog screen you could see where the glow seemed to "leak" fromt he digital one. one person suggested that the graphics card could be over heating, but i don't think that's the problem. all other programs look fine when that happens, anyone know of any programs i can test that with though, it seems only to be related to glow because when i turn off basic shaders in sl, the glowing goes away until i turn it back on and it's the same card and power supply i've been using for a while, i just recently changed the motherboard though. here's the system specs and some pics

CPU: AMD (Unknown model) (2600 MHz)
Memory: 3328 MB
OS Version: Microsoft Windows XP Service Pack 3 (Build 2600)
Graphics Card Vendor: NVIDIA Corporation
Graphics Card: GeForce 8600 GTS/PCI/SSE2/3DNOW!
Windows Graphics Driver Version: 6.14.0011.0095
OpenGL Version: 2.1.1

http://www.flickr.com/photos/22848506@N08/3734912993/in/photostream/
http://www.flickr.com/photos/22848506@N08/3735709156/in/photostream/
http://www.flickr.com/photos/22848506@N08/3735708830/in/photostream/

Two things come to my mind. You say you upgraded your motherboard. Did you also check for the current drivers for it? And I see you are using nVidia's 100.95 (or is that 1100.95? I don't think its a driver version that is old enough to be so many revisions back so I'm assuming it's the most current) You might try 185.85, which is the driver I use for my 9800GTX+ card (it's also listed for the 8600 cards). I use DVI only and I don't have that glow effect you do. Also, I had an 8600GT card before this 9800 card....that card runs pretty hot......you might check that as one of your friends suggested.

All I can come up with right now. Good luck.

Is that video driver a driver from Microsoft?

i installed the drivers that came with the hardware. and then i went online and checked for updates and got the latest drivers, both the motherboard and the video card are nvidia products.
the thing that puzzles me, is if it's overheating why is it doing it on one monitor and not the other, even though they're on the same video card. does vga vs dvi make a difference?