A bit ago, I had sold some potions that may have been from some time ago (hard to keep track of when what was made when you have bags of potions), I have a rather large personal stock for myself on both my character's. I feel rather bad for selling the other player duds but also worry about my own stock.
For him it was Imp invis potions, are there any others affected I should be worried about? I assume I can likely figure out which are duds easy enough by making a new batch of imp invis potions and then trying to stack them with current stock. Those that fail likely being the broken stacks?