I'm using the Auditor and I have my anti-captcha key enabled. I started running the audit approx. 4 hours ago and when I came back to check, I see it was still hung up on the same captcha from earlier this afternoon.

Does this mean that my captcha key isn't working or do I have my settings wrong?

We're now investigating the case, checking all possible reasons - both on our server's side and on the side of our partner CAPTCHA detection service. We hope to find a solution really soon, sorry for the inconvenience.