Hi Andy,

Thanks for the additional information.

I have discussed captchas on other forums and there appears to be consensus that robots can easily break these captcha systems, which is why the Wordpress developers ultimately opted for a different approach by implementing Bad Behavior and Akismet and other similar systems such as Spam Karma.

Is there something different about your captcha system that makes it more difficult to penetrate - or is it just that the robots haven't focused on your system yet? I believe that the PHPLD people had lots of difficulties with their captcha systems though there is a mod available to PHPLD owners, similar to Spam Karma, that seems to be working.

Blocking also seems to be a very short-term solution since IPs and domains appear to be easily changed via proxies, etc.

Thanks for any additional info that you can provide.

Rich