Kellogg has recalled 28 million boxes of the aforementioned four cereals. The problem, reports the AP, is that "a 'waxy' smell and flavor coming from the package liners could make people sick."
From the Kellogg press release announcing the recall:
While the potential for serious health problems is low, some consumers are sensitive to the uncharacteristic off-flavor and smell and should not eat the recalled products because of possible temporary symptoms, including nausea and diarrhea.
Should "corn pops" now be used as a euphemism for diarrhea? Discuss in the comments.