M. Smucker's plant. A big recall of its products ensued for items sold in Canada as well as the United States. It wasn't just jars of peanut butter that needed to be tracked down, either.

On the bright side for JM Smucker (and for customers), the amount of peanut butter they had to recall was relatively low, with only about 3,000 jars affected. However, the downside was that these ...