I was in the Nellis power basemant area and decided to jump over a rack. After I landed, the first person view was completely messed up with the pip boy being farther away and weapons physically aiming too high when static and too low when using the iron sights.

I tried to reload other saves, but now they've all been infected with this issue. Here are some screenshots. I have not changed or added any mods recently that chagnes skeletons or animations and the existing ones have been fine for months.

http://cloud.steampowered.com/ugc/577863206907960735/69839543691E7A800616155A52332434EBF67466/1024x576.resizedimage

http://cloud-2.steampowered.com/ugc/577863206907958202/D444347F35BC0FC23012F3D0DC4C5E57F7642E97/1024x576.resizedimage

http://cloud-2.steampowered.com/ugc/577863206907961159/F6F66391A78CC6E1D6F4BADD81A4585BA3DB859D/1024x576.resizedimage

Turn off the iron sites feature, then play a bit, then turn it back on.