I read somewhere recently that a high percentage of recipes in cookbooks have errors in them. Despite extensive checks by the editors to make sure recipes work, it is easy for typos to occur, and ingredients to inadvertently be missed.
Now this horrifying news story on FindLaw:
Magazine Recalled Because of Faulty Recipe.
I have always played around with recipes and many times considered them guidelines only, but will certainly view them with a healthy dose of skepticism in future.