hmm strange I saved the game before the quaffing of the potion <img src="/ubbthreads/images/graemlins/smile.gif" alt="" /> so I tried it a couple of times and the only thing that changed where the Survival stats in the Invent/stat window <img src="/ubbthreads/images/graemlins/question.gif" alt="" />
That's what should happen.
