shading bug

[Shogunato]

Hi

http://img472.imageshack.us/img472/4271/sanstitre1vc3.jpg

As you can see on the picture, i have this shading bug on the screen.
My video card is clean and updated.
I thinkt this issue may come from preferences but i don't found the reason.

please, any suggestions to fix that ?
thanks in advance guys ^^

[sunder]

Hi Shogunato. Try increasing your Color Quality in the Display Settings (right-click the desktop and click properties) to 32 bit.

[Shogunato]

you saved my life Sunder

thanks !