[Plugin: WP Captcha-Free] Invalid Data: Please go back and try again.

I too get the error message after upgrading to WordPress version 3.0. It throws back the comments with error message – Invalid Data: Please go back and try again.

Please help.

I can confirm the above,
this plugin is not longer working in 3.0.

Thing is, most WordPress users would never know.
Often, commentors won’t try to contact you, if the contactform is bugged, luckely, i had two of those, one even with a clear bug report.

After disabling, the number of comments increased by 30%, so probably many were experiencing the problem!

Any solution yet? The plugin is beautiful. Please resolve it for WordPress 3.0 and higher.. Please…

I fixed it finally.

Go to wp-content -> themes -> your theme folder -> comments.php
Find this line.

<?php # do_action(‘comment_form’, $post->ID); ?>
Remove the # and upload to your themes folder.

If the above line is not there, you can insert the line below the <textarea> in the comments.php file.

This worked for me.

I’m using WordPress 3.1. In order to bring it to work with wp-captcha-free v0.7 I had also to modify the the following two lines in wp-content/plugins/captcha-free.php:

(78) document.getElementById(‘commentform’).onsubmit = null;
document.getElementById(‘comment_form’).onsubmit = null;

(93) document.getElementById(‘commentform’).onsubmit = gethash;
document.getElementById(‘comment_form’).onsubmit = gethash;