https://www.dotnetzone.gr:443/cs/blogs/iwannis/archive/2009/07/26/captcha-design-and-implementation.aspxIn my first blogging days, I received a comment for a post saying how wonderful and special the thing I did was. I was thrilled! Then I received 5 more comments with exactly the same sentence and then 5 more and I realized that this was my first encounterelCommunityServer 2.1 SP3 (Build: 20423.1)