We have been plagued with spambot problems for quite a long time now and default (older)IPB /recaptcha has been failing to stop spambots from registering with the forum.
http://www.codinghorror.com/blog/2008/03/c...ve-captcha.html

http://stackoverflow.com/questions/4484477...m-from-spammers

http://keycaptchaured.wordpress.com/

This forces us to manually approve and screen all registration and it's a very boring work to do!

Upgrading the forum is out of question for now since forum upgrades cost hundreds of dollars and forum's theme also needs re-skinning which don't come cheap.

I'm currently hiring a developer in India who currently trying to find a low cost solution to this. Let's hope anything good come out from this one.

If you have any ideas/comments to combat our spambot problem please post them here!