Am finally getting around to playing The Witcher 2 for the first time (yay!) and have just start the tutorial...only to find a really weird graphical glitch. In short, bits of Geralt's face (and the first NPC he meets) randomly flash bright whitish colors, so it looks like they're being constantly electrocuted. Is this a known bug? FWIW, I'm using an ATI Radeon 7870 with the latest drivers.