Also, do you have any other actual follower mods? Ones that place an actual follower in Skyrim and not an overhaul? If you have no mods of any of those type then make sure Aurlyn is about near the bottom of your load order. You say you don't use any follower overhauls, does this include mods like follower retextures (such as Decent women ) and overhauls of the follower system like UFO (), AFT(), EFF ()? I'm asking because sometimes "overhaul" can be a misleading word. I don't know exactly the causes, but normally for me it is a mod conflict. If it is not fixed, let me know and I will try to figure out something for you on that end.
Kya, I'm assuming your other post is fixed (the missing textures and all that) since you deleted it.