Also had this issue, but it normally only happens if I am overloaded and then go to the point where I can no longer move on the main character.
You gave a good example of reproducing it Raze. I never had it happen then (as I never moved stuff to the main character). If I was almost full and bought something from a vendor while at the same time selling my gear so it registered I was overencumbered even though all the weight was gone it crashed the game. The only other time it crashed was if I was overencumbered to the point I could moved and I paused the game and tried to drag items out of my inventory onto the floor (which it won't let you do in pause).
I avoided the problem by not letting these 2 situations to happen anymore as they're both easily avoidable. Been using the Steam version.
