Well i got the neverending loading screen when exiting farglow. But:
When i was in conversation with the npc just before leaving and i selected the option END when she was still talking (her last sentence before load) it worked and i could continue
I double checked this, when you dont press END: neverending loading screen. When pressing END (at her last sentence) all is well for me that is.
I don't see what effect ending the dialogue would have...or why it would fix the problem. Are you sure it wasn't just a coincidence? Did you change anything else?
I feel silly for trying it, but I just did, and same issues.