I have no solution as of yet, but i do know that the camera slowly shifts up or down (mostly down) and it seems related to the aiming animations, cause they hold camera position info for the guns. What i also know is that when Bethesda's gamebryo engine goes above 60 fps, you are going to get nasty bugs in the game, every single Bethesda Gamebryo game does it. So making sure the FPS never reaches 60 fps would ensure it won't happen, someone said 54 fps limiter, but 56 is also good, cause every limiter has a slight variance in framerate, so if you'd set it to 58, it would occasionally touch 60 fps, and then it can happen again. It looks to me like the animations are not completely played out and blend into the next iteration too early, but i also know that when it starts you only have to aim and move your mouse up and down and you see it drop down pixel by pixel with every move you make, and it only stops when you limit your fps again below 60, i tested it with ENB limiter, cause you can enable disable that while playing. Also, if you play for a while without limiter, after a while in first person you get smaller and smaller, but if you then go into 3rd person you see that the player's scale is ok, it's just that the first person camera has dropped. It isn't related to stutter remover, cause if you limit your fps with other software then stutter remover, it works fine too. It is most likely a Gamebryo fault, so you'd have to device a workaround for that, as in, control the position of the camera, someone like the guy from enhanced camera could probably make that happen in a fose plugin, or you might be able to edit the animations and remove the camera positioning from the animation or something like that.