I'm not sure if Bethesda takes a look at these forums but I had problem where I was given a quest by an innkeeper/bartender in Riverwood to go kill the leader of Valtheim Keep. Several hours later when starting the Companions and got the same quest...but since the leader is already dead, the quest marker just hovers over his dead body, and I can't move forward in the arc. Anyone else have this? I'm guessing this is related to the Radiant system (which is a great concept) bug not referencing previous random quests correctly.
I'm certainly not livid or complaining a whole lot here, I am really enjoying the game so far and going back 2-3 hours to do a few things over again isn't going to kill me, but it is a little annoying. Just putting this out there in hopes it is noted and potentially fixed via a patch at some point.