Something's been eating just the bottom of peppers!
I hate to admit it, but I may have contributed to this problem.
I've been broadcasting crushed red pepper into my raised beds in an attempt to deter the squirrels. This may have had the unintended consequence of conditioning the squirrels to develop a taste for spicy food!
Oh well, it could be worse! If they're gonna get curious about my peppers, I'd rather they get into my Cayenne peppers than into some of my more interesting varieties.