I solved the whole Tingalf/Marcus' stolen goods, mostly. I told Marcus about the burned cart and about Tingalf's suspicious goods. Then I found out Trevor in Verdistis suspected Tingalf. So I had about a million Tingalf quests.
I went to the sewers and found the cache, then grabbed a manuscript and talked to the guard and had Tingalf arrested. Then I went back to Trevor and told him. After all this I still had a quest that said I should find Marcus' stolen goods. Eventually I found the driver's bodies and the cave with more goods. I killed the assassins and got some more XP when I showed Marcus the manuscript.
But now I have a quest that says, "To Rivertown" and it says something like Marcus will be upset about his goods. But he just asks how I'm doing when I talk to him. Is there anything left to do? The town guard captain, Marcus, and Trevor don't have anything to say about it. And Tingalf is arrested and gone.
Ok, here's another one I can't get rid of. "Bottle of exquisite wine". I talked to Anthrabert early on and refused to burn Mpenzak's cart. After it was found burned I did the whole "suggest Anthrabert to the town guard" and now he's gone. Much later I started the summoning a demon quest and talked to the wine dealer. This is when I got the exquisite wine quest.
I went to Anthrabert's room and of course he was gone. I took the wine and finished up the summoning a demon quest but it's still in my quest log. Was it the wrong wine? Corrina said she didn't like the wine. Also, Mpenzak still says "oh my burning cart, what happened?" even though Anthrabert is arrested and gone.
Sorry this is so long, I wanted to be specific. It just bothers me that I have unfinished quests in my journal.
