Hi all!
I've readed on the forum almost everything about this problem, but for me it does"nt work any solution provided by forums. Please help me
Joomla 2.5 latest version
K2 latest version
My site: www.traditiioltene.ro

I have had a similar problem, and the cause was wrong version of jQuery. I have looked at your page and I can not see that jQuery is loaded at all, so maybe that is your problem. Try loading jQuery 1.8.3 and see if that helps.

My thread for reference: getk2.org/community/New-to-K2-Ask-here-first/170866-Possible-bug-in-k2-user-module

Thanks !
You pointed me in the right direction.I've enabled jquery but still captcha was not appearing in my k2 artcles. The idea is to play between jquery versions and remote or local copy. For me the solution was to select local copy.
Again thank you very much! was