I just released a new version of the sfReCaptchaPlugin.
It updates the recaptcha-php library to version 1.9 (unfortunately there is no changelog available), fixes a problem in the example module where in some cases an error would’ve been thrown if no text was submitted and updates the documentation.
The most notably change to the recaptcha-php library is that constants are now used instead of globaly declared variables, so that the version included in the plugin doesn’t need to be modified anymore – which is great in terms of maintenance.
To upgrade your existing installation, just execute the following command:
symfony plugin-upgrade http://plugins.symfony-project.com/sfReCaptchaPlugin
Please go to the symfony-wiki page for more information.