all my thumbnails are mermaid tails!

hello!  after the last update all my CAS thumbnails are mermaid tails.  i hoped to fix it by using the delete thumbnails feature of S4S and it worked except for the shoes category.  it's all mermaid tails as far as the eye can scroll, lol.  i also removed all CC and Mods related to mermaids, still didn't fix the problem.  i'm out of ideas and googling the problem comes up empty. any ideas?!  thank you!