Nemo – this is just a session cookie, the really long lived cookie is probably the comment_author one is it?

John – that’s probably very true. This will break on clients that don’t support CSS. Perhaps loading a small image would be better but then they may have images turned off or runing through a proxy server that compresses them that might strip the cookie.

Trackbacks and Pingbacks are not affected. That’s one reason you can’t do without Akismet!