Alert followers of the dominionstats code base at github might have noticed this odd commit comment:
"card_list.js added plural for diadem [rrenaud]"
Turns out an Isotropic game log mentioned "Diadems", and it led to an error, so rrenaud had to include a plural for Diadems in the card list.
Challenge: Why was Diadem pluralized? Under what circumstance did an Isotropic game log spit that out?
(Note: the answer is NOT "There was a user with the name "'Diadems'.")