Hmm, well according to a quick goole search.. recapture can easily be bypassed via the audio challenge using Google Speech Recognition. so I guess it wont be long before a new captcha method will be needed?
Tested my own website again today, straight away got the "Street sign" test, which, as previously reported, failed even tho its blatently obvious which squares have the signs in them... Why does it fail if the quiz is answered correctly?