I switched to invisible Google reCAPTCHA last week, but their badge was huge and obnoxious, so I nudged it out of sight. That caused some errors on a few forms (oops). I think it’s fixed now, but if you still get an “invalid reCAPTCHA” error after leaving a secret or comment, hit me up on the contact page.
Also updated the Privacy Policy to mention that FartDump uses Google reCAPTCHA.