After introducing recaptcha to my blog, I have enjoyed some time spam free.

They are back, but this time instead of using comments form, they use something what is called Trackback/Pingback.

TB/PB is basically an interface which allows blogs to talk to each other. For example I have blogged about something and some other blogger has wrote a comment on his blog about my post and linked to my post, TB/PB system will then tell my blog about that blogger and send me his post so I can approve it as a comment on my blog.

Easy… but it goes around recaptcha and lands in my for moderation queue … and this is how spam gets to me now…

Fortunately there are some plugins to deal with that kind of spam … but they are not as efficient as recaptcha  … still will have to try