I have rebuild plugin, problem solved. Corrections:
- updated lib "recaptcha4j" to the last version(0.0.8) - this solve problem with old ReCaptcha domain
- newReCaptcha method in sing-up.jsp changed to newSecureReCaptcha - whatever you use, 9090 or 9091 - captcha always comes via HTTPS
Now all work fine. Rebuilded registration.jar, just need to upload into Admin Console:
http://www.sendspace.com/file/g1x8mv
P.S.
Sorry for my Eanglish ^)