I have US PC-dvd version 1.0.12.52 straight off the shelf at Best Buy.
I went into some small little trapdoor in the ground in the first area, when I went back to the barracks, the doors were either voids of blackness, or bricked over. Even if I reload, the doors are still gone. My other post explains all the other problems I am having frown

Windows 7 64-bit
Intel QX9650 extreme
nvidia g-force 275
4 gigs ram 1600Mhz