The reCaptcha function has been temporarily disabled for Joomla 3.2
From Joomla! Documentation
Error Message: The reCaptcha function has been temporarily disabled for Joomla 3.2
What is the cause
Google [changed the reCAPTCHA URL](https://groups.google.com/forum/#!topic/recaptcha/V7qswqBnA1o)
How to fix
For v 3.2, go to plugins/captcha/recaptcha/recaptcha.php and change:
- - line 22 to the new RECAPTCHA_API_SERVER URL of 'http://www.google.com/recaptcha/api'
- - line 24 to the new RECAPTCHA_VERIFY_SERVER URL of 'www.google.com'
- - line 129 to the new RECAPTCHA_VERIFY_SERVER value of '/recaptcha/api/verify'
See the change in the next patch: https://github.com/SniperSister/joomla-cms/commit/01e3c84d653c4331f7e11c85aa605426c00bbf6a
This fix will be included in the next release.