We've had a crazy influx of bots registering for the site and then repeatedly requesting password resets that bounce back from their bogus email addresses. I'm not sure what that accomplishes but it was enough to make my hosting company unhappy with me.
Previously I used some hidden tools to try to prevent this sort of thing without having to resort to captchas but it was obviously ineffective and the hosting company threatened to shut down my account if I couldn't stop it. I know nobody likes a captcha but unfortunately that's going to have to do for now. Sorry for the inconvenience. The good news is you should only see them if/when you are logged out. If anyone has any problems please click the email icon at the top of the page to let me know. Thanks.