Hey, you have nVidia.

When a program that uses Direct3D, OpenGL, or a special script that is used to make the transparency is opened, trancperency is automatically disabled so your computer doesn't freeze up.

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OMG!!!! osxdude's signature changed! [quadhundreddruple n00b typing is now on] WHAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHHHHHH! (osxdude is still crying) [quadhundreddruple n00b typin is now off] I know it's not common it's just.......Khaula's being mean to me!!!!! (osxdude will cry until Khaula says sorry) I lol'd OMGOMGOMGOmg