In beta 16c, you can set a FFC to use a script. Close the FFC editor and open it again, and it's fine. Close the entire ZQuest editor, though, and the script goes back to being 0. This is why part of my Cane of Somaria script isn't working, and it's very annoying. This could very well mess up quests. I do not know if it happens for quests from previous versions, but I know it happens to 16c quests.