Captcha/reCaptcha integration support ?

Same issue here: Does not display captcha form.

Even when using captcha_after (threshold of 3 or more failures) it fails first attempt to create an account.

I'm wondering if the developer has any opinion or experience of this issue.

Here are some alternative spam protection modules which I'm going to have to test out:
http://drupal.org/project/badbehavior
http://drupal.org/project/botcha
http://drupal.org/project/captcha-free
http://drupal.org/project/honeypot

Please, take a look at module demo: http://ajax-register.drupalace.ru/
Looks like Captcha (http://drupal.org/project/captcha) is supported. There is also 'ajax_register_hide_captcha' option, which can disable Captcha in AJAX form.

@smilne23, Honeypot module started working for my AJAX register forms after I changed default Honeypot element name.

So, I think we need more info about this problem.

Agree with kalabro: I need more info about this issue. On the example site captcha works properly.

Patch #170 in https://www.drupal.org/project/recaptcha/issues/2493183#comment-12850181
has fixed this issue for me with recaptcha