Patch 6. This bug gets me every time:
if you kill Khaga (and the Shadow Druids) the journal updates, but not the Investigate Khaga quest with the entry prompting you to talk to Zevlor… happens if one of the hostile druids is still alive… typically the lonely guy that walks in the side room when the combat starts, because he may remain far from your characters and not enter combat.
If you then talk to Zevlor (because you know you should…) he acknowledges Khaga is dead, rewards you, but the Investigate Khaga quest does not complete. If you go back, kill the remaining hostile druid (because you know you should…) the quest updates, you’re prompted to talk to Zevlor, but then he just chit-chat…
Short version: Investigate Khaga quest should also update when Khaga dies, not when all hostile druids are dead.
