The invisible armors/helmets and floating helmets are not an error that you are experiencing alone. There was a patch recently and it did unfortunately launch with a few bugs. There should be a hotfix coming soon to fix these texture glitches. Otherwise, you have crpg working flawlessly.
As for the music, you must have had the in-game music volume muted or something, since it has been there for an awful long while, if not forever.