Throw Out Your Peter Pan
If ya have Peter Pan Peanut Butter ya better consider tossing it. The FDA has warned that it may have the funk in it. For the specific funk it may have... read here.
Check the serial number on the top of the cap. If it starts with 2111... its effected.
I found a jar in my pantry. So did some folks in Murfreesboro. You may as well.