Had some success today moving "The Companions" quest line forward.
Like a lot of people having completed
I returned to Whiterun only to find it in a 'stuck' state. The relevant NPC
wouldn't give me the next quest in the series:-
despite updating the previously completed quest. Several NPC's had gone to scripted locations and remained stuck.
Advice on the Internet at
The Unofficial Elder Scrolls stated that you had to wait one in game month for the Dungeon at Driftshade Refuge to respawn. It appears that a lot of problems with this quest revolve around people entering Driftshade Refuge to complete another quest.
There was a rather ominous warning that "There is a chance that waiting the 30 in game days after clearing Driftshade Refuge will NOT correct the glitch. Also, entering Driftshade Refuge before the quest activates may not fix the problem either. If Driftshade Refuge has been cleared prior to completing Blood's Honor, no matter what, there is a chance the quest is forever lost." Eek.
So since a month in game had elapsed, I did what the bugfix suggested and used the console to advance to the next quest. With Vilkas in front of me in Jovaskrr, I typed the following
setstage C05 0
This removed my existing companion and added Vilkas (as it should do doing the quest normally) - I then got the updates in my Journal and off we set to Driftshade Refuge.
Completing the quest and then returning to Whiterun sucessfully updated the Journal and advanced to the next Quest. I can confirm that all NPCS returned to their normal behaviour and everything seems find again
Hope this helps anyone who finds themselves with this problem.