First off, This game rocks. go buy it now.
My biggest annoyance is the lighting, especially when using a light spell (instead of a torch) gives everything a really ugly glow, and the “Bloom” effect is way over used.
I was playing last night, and I ran into a bug. When you go to the Count in the Ulterior Motives quest for the Mages Guild, the steward tells you to come back tommorow, and he might let you speak to the count. I've waited several days, and he still says the same thing. The strategy guide says he should only make me wait one day. I'm running around doing some other stuff for a few days to see if that fixes it. If it doesn't I will have to restore back a bit, or possibly even restart! ;(
I have seen some other minor bugs, especially in the AI, or NPC locations, where I will walk into a room, its empty, leave and come back, and there the person is (with no other entrances) Also walk into a room, and everyone is clustered together, but then they all jump away from each other suddenly when I am in the room and start their normal AI routines.
update : I ran around and did some other quests for a few game days, and when I came back, the motives quest had started working again, but there seems to be a requirement that the waiting happen either outside the castle, or outside the town, or maybe I talked to someone else, and kicked off a flag. Anyway, there you go.