Problem with the CAPTCHAS

A friend recently said

For some reason, LessWrong is not letting me register an account. It keeps telling me that I'm getting the CAPTCHAs wrong, even though I'm not.

Does anyone know the solution to that?

I just tested, and the captcha does appear to be broken in such a way that it is impossible to make new accounts.

Have you contacted user:matt?

I sent him a private message. This does not guarantee that he's seen it, but it's the best contact method I have handy.

Message received. Dave or Wes will have a look tomorrow. Other, more reliable method of contacting me: raise a bug report at http://code.google.com/p/lesswrong/issues/list

CAPTCHAs were broken for the last 24 hours, they should be working now.

Things to check in general when this happens (I don't know if any of them are relevant in this particular case):

Is Javascript enabled? Including third-party sites?
Are cookies enabled? Including third-party cookies?
Are you blocking or spoofing the referer?
After turning on scripting, cookies, and referer, open the registration page again, by clicking a link or copypasting the URL rather than by refreshing the page.

Try moving to a different computer or having someone else register them an account.