For the quest I:
1. Got the quest
2. Found a cave with the orc
3. Told the questgiver
4. found the poisen at the inn
5. questioned the inn owner
6. Talked to the questgiver
7. went and talked to the guy in charge of fixing the plague and says it was stolen from him
7. went back to the questgiver and he said he knew it wasent that guy so now go find the real guys or somthing like that
8. Couldent figure out what to do, and havent found anything new about it as i have done other quests.