MoP - NPC undertexture

[aiaxfuffels]

First I apologize for my english skill

Like a topic. There's some NPCs that are cover under the texture, prevents to continue the main quest line in the starter area like Josiah Avery in Gilneas or others on the Pandarian island

[VonChronos]

I just have this problem right now -_- I don't know how to continue my leveling.
P.S.: Found him,my bad he was in a basement.