The captcha looked quite clearly to me to be "inctory". These captcha's are not necessarily real words (I believe to thwart dictionary based crackers?), and I also am pretty sure the service they are using is not tied to Yelp itself.
You can often make it through after painfully screwing up the hard to read word.
If you don't like the reCaptcha ($deity know why, but it's your right), complain to the website, don't fuck it up for everyone else.