I started the Alduin's Wall quest as normal. Everything was working fine until I got to the Sky Haven Temple.
A few things happen...
1.] Delphine and Esbern can appear near the Sky Haven Temple region randomly and seem to attack me.
2.] Once I get inside the cave, Delpine and Esbern will attack me.
3.]
If I fast travel to a city or place, Delpine and Esbern are there, and they won't attack me. Even if I attack them. They go and attack any villagers, guards, even try to attempt to kill NPC's that won't die. Though a few villagers do attempt to attack me. Even though I've done nothing to cause this.
However I fast travelled to a place such as Whiterun, and Delpine and Esbern are there, attacking any NPC. I'm also being attacked by the villagers, guards.. but they focus on Delpine/Esbern more.
I try leaving through the gates, Delpine and Esbern are not there yet guards keep attacking me.
Though it was quite funny when Delpine tried to attack the little boy in Riverun and called him a ugly thing.
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The only thing I haven't tried is riding via horse back to a city. And it took me a while to reach the Sky Haven Temple. >.<
I'll give it a try tomorrow, see if it fixes this bug. :/
Oh and I don't have any previous saves at all. I had to turn off auto-save because at the time, it caused the game to freeze.