After today's update I had the game crash twice trying to interact with the NPCs for the quest Council of the five companions. This has never happened to me while interacting with a npc before.
I have had this happen a number of times when trying to complete the main quest. The PC version would drop to the crashed application dialog and it would, most often, happen when the game was trying to change to the NPC dialog view. However, there was a time when, around the Groundskeeper/Meridia speech in the Planar Vortex, my system would crash.