Some of the traps on the first half of the revamped gnolls, especially in front of the door that divides the area, right after the caged rothe, are hard to see, because the textures actually float up on the mine shaft support beam thingies or are otherwise hidden by the terrain.
as a suggestion on the side, and though gnolls is alot cooler now than it ever was, there's probably too many of those spike traps because you can't disarm them, NWN characters move like vacuum cleaners, they're small, really close, sometimes invisible. Add a little lag with a big party in those tiny tunnels and they quickly become a chore even when they're all scouted out. More with less, maybe!