> You can’t login if you haven’t registered.
Sure, I know that. But for testing I wouldn’t need an account. The captcha is tested first, before the login attempt is handled to the WP login procedere, so if the captcha fails I will the captcha failure message, even with false login data.
Anyway, I installed the All in One security plugin, enabled all of the User-Login options, and tried to login. It worked. (Also on your site it worked the one time that I tried.)
One more question on your original post:
> in Firefox, I immediately get an error “the captcha didn’t verify”
Does it really appear immediately when you click the checkbox or after submitting the login form?
Double-validation was just a guess. It is just be one possible reason for the “captcha didn’t validate” message occurs.
Another guess: Do other no-captchas work for you?
Here is one you can try:
https://podpirate.org/wp-login.php
Try it with username ‘alias’ and some random password. Solve the captcha and submit the form.
- If the “password incorrect” message occurs then the captcha got through and it works.
- If the “captcha didn’t verify” message occurs, then there might be something wrong with your browser(s). You may try further by disabling all browser addons and re-enabling them one by one. (If you find the bad guy, please post it here. It might be helpfull for someone else.)