Captcha issues

[fu]

We had some issues with our captcha earlier today which prevented people from making new accounts and prevented some comments from being posted.

We've fixed things, and we're contacting our captcha provider to make sure we don't run into this again in the future.

Thanks all for your patience! And lots of thanks to everyone who reported the issue and all our support people who made sure we developers knew something was up. If you notice any further weirdness, please open a support request and we'll look into it.