Also i can't start new game after i already finished one and don't exit game. After introduction message i had Congratulations screen.
Its a bug.
Just drop stack of items and set number to zero. Then you can use this item and counter will be incremented negative (for example travel rations). Don't check them == 0. Check stacks numbers for <= 0.
Hi! Great game. You have a bug with dropping 0 items.
