Nostalrius Begins - Quality wow vanilla realm (1.12)

Hey, I've been having some weird issues lately:

1. I log in successfully, only to find that none of the characters around me have any clothes on, and all have <Unknown> as their name

2. I log in successfully but my player model won't render (everything else will)

3. I'll be in one of the major cities, usually near the AH but not necessarily posting anything, when the game will crash. Frequently this happens as soon as I log in on my bank alt.

Ideas?

Ok the crashes seem to be addon-related, however #1 has been really pervasive. All characters are naked and (unknown), all NPCs are static but also, (Unknown), fubar reports me as having 0ms latency, and I can neither log out or quit - I have to end the WoW process to get out of the game.

Does it still happen without any addons, a clean wtf folder and clean cache?