Today I've started playing the spanish version of Dawnguard. Previously I've noticed every new enemy is invisible. Now every dawnguard character and every vampire character are naked. If you kill them and loot their bodies, they do carry new armors such as "vampire armor" but the armors don't have an armor stat. They have wheight and price but no armor stat. This happens with every dawnguard armor piece, every vampire armor piece and every falmer armor piece. The defense value of every armor is 0. And it's really funny to see vampires and guards going to battle only wearing underwear.
I've tried to download again the DLC and the last game update. The problem still remains. I'm not sure if this forum is the right place for this, but I don't know where to report this problems.