Soooo many bugs...
Seemingly random crashes, both to desktop and blue screen. They happen while I'm just running around, talking to a vendor, in the loading screens.... just doesn't seem to matter... I only seem to get one for about every 4 hours of gameplay but I can't repeat them because I'm not typically doing anything noteworthy at the time and it's never the same.
If I break down the door to Esmeralda's shop, go in the basement and then try to leave, sometimes I get stuck in the doorway of the upstairs room and and can't get out.
Quest waypoints disappearing or changing. One notable case of this was when playing with a friend. We had waypoints in completely different locations and the game crashed. After restarting, his waypoint was where mine used to be and mine was gone completely.
Combat bugginess. I have 3 examples of this:
1. When fighting the giant orc trooper outside the cave, he simply stood there and let us wail on him until he died.
2. Sometimes if you use the phoenix dive skill, and kill an enemy who explodes from the place where you jump, he will interrupt the jump causing you to not jump. Sometimes though, the enemy to which you were planning on jumping will still take the landing damage even though you didn't jump because of the exploding enemy.
3. ok.. this one has only happened once so far but completely destroyed the immersion and was hilarious. While playing online with a friend, he had 1 AP left for his turn and clicked to move like 3m. something went horribly wrong though and he ran about 100m in that direction, completely ignoring any unpassable terrain along the way. He just walked right over cliff faces and through trees. After he finally stopped moving, he was unable to move again until the combat was over.