Okay Eudaimic I left a comment on your site and looked at the headers. The set-cookie lines just aren’t being sent by b2comment.post.php like they should be. My only guess as to why this would be effecting you is that it’s related to IIS. I will look around to see if there are any cookie monsters that are IIS-specific.
Just found this on the PHP manual comments for setcookie:
If you experience problems on Microsoft Information Server (IIS) when setting a cookie via PHP and when PHP is running as a CGI binary it is not setting the cookie. After spending many hours on what the problem is here is what happens:
I switched from MT to WordPress recently so I’m using 1.0. In my popup comments, the poster information isn’t saving which I assume as everything to do with the cookies. I’ve no idea why… I tried to look for something that might have been commented out, but alas nothing. I’m at Dreamhost, phpinfo says Apache server.
Not really sure where to go from here. Help/suggestions much appreciated.