It's just after you kill Sarge and first go into the caverns, do you remember the bit with a computer and there's supposed to be a skeleton sitting in a chair as if he'd been killed while typing ? and there are supposed to be skeletons lying around on the ground, they aren't there, were with my old graphics card though, also the intro video doesn't display the words "Doom 3" at the beginning. I've found out a few ppl have been having the same problem. I've been trying everything I can think of really, re-installing, latest patch, latest video drivers, tried Doom without the patch too.