Well I've noticed then when I hotkeyed my flask and used it the game would freeze making me have to restart every time. If I clicked to drink from my bag it would not freeze though. Also back in W5 I skinned a pig and the second I did that everyone within a 30 tile radius would crash. We had to wait until the damn thing degraded before we could go to the northern part of the village :S
Edit: I've tested the flask thing on more than one computer