Well disabled the non working existing captcha plugin for a day, and this blog was filled with 30 spam comments, and 1 was such a big long list of porn keywords that it overloaded the server to some point and firewall banned the ip automatically :).
Well got rid of the old one, and got the new reCaptcha plugin , which is XHTML valid whohoo.. and hopefully will serve well and prevent the unwanted spam and unwanted commented. If anyone know of a really good spam blocker for wordpress please do let me know.
I shall now be upgrading wp to latest version (yet again ) damn this WP blogging software is PITA when it comes to keeping it upto date ! It would be way more productive if it did not have so many bugs/security issues !