I have WP 3.5.1, CF7 3.3.3, WP-reCAPTCHA 3.1.6 & CF7 reCAPTCHA Extension 0.0.12
Email is sent and received when the captcha is shown and properly filled.
But it doesn't if the form is filled by a logged user, when the option to hide captcha for logged users is active in WP-reCAPTCHA options (Target Hide for Registered Users).
If so, it gives this message after trying to send (translated from spanish)
Validation error occurred. Please confirm the fields and submit the form again.
It's not a serious problem, but maybe a bug worth checking.