I'm not sure if this has been reported by other users, but I have been frequently experiencing enemies with clipping problems. It happened when I first got the game (release day) and is still happening now. Most recently I have seen Bark Scorpions half in/half out of the small hills in Hidden Valley and Radscorpions doing the same thing near the Nipton Road Pit Stop. I also had a Powder Ganger clipping outside the Jean Sky Diving shack- he was "inside" the shack walls (in the outside world), yelling at me and trying to fight, then appeared under/inside the staircase behind the shack.
I have also had issues with my guns/arms somehow being raised while in first person mode, blocking nearly half the screen.
Please address this in future updates.