Enclosing asterisks marks text as bold (*word*), underscore are made via _word_.
Standard emoticons like :-) and ;-) are converted to images.
You did not enter a public/private key for the recaptcha setup. No Captchas will be used. If you want to use Recaptchas, please enter the keys in the configuration section of the captcha plugin or switch to traditional Captchas.
To use reCAPTCHA you must get an API key from http://recaptcha.net/api/getkey