Stop using Google's new recaptcha. It is too much incompatible with many browsers, and it is just too annoying to answer it. You say you couldn't tell that I'm human? Let me point a few hints that my access logs for that session have:
the pages I have seen, and the time between their requests are perfectly normal for any person to do
I took a few minutes to write my question
I was shown an useless warning about the tags I tried to use for my question, and after this (also, with a human common "time for thinking") I retried with a subset of it - a smart and good system/site could just point which of the tags I wanted had a problem, couldn't it?? But my guess was correct.
After this step I was shown the empty page where a JS-enabled-only google na*** recaptcha should live
This is very disappointing.
"Works best with JS enabled?" or should it be "Works only with JS enabled?". I won't use if the second one is the objective.
Since some of you may live in a google-only world, it hides things for you. Did you know that you can still use the not annoying and JS-less-if-needed old version of reCAPTCHA today?
Better than that, there are easy things that can work like it, that many sites use: make one small word questions that humans will answer correctly but can't be easily guessed by bots. Look, textcaptcha.com is just one among the first few results in a not-bubble-locked-result-by-google search I did now.
And in the next page the same captcha problem should happen... I just took 5 or 10 minutes to write all of this. Yay, I'm not a human! :)
putting tags => "you cannot create tags, although this is just about one tags you chose"
putting no tag to avoid useless steps like above's continuation => "please enter at least one tag"