My WP site (http://www.gamergeoff.com) has several users who are in the Authors groups, and for most of them, the site works as I would expect it to work.
But for a couple of them, their posts appear without a Comments box. I have viewed the posts in detail and cannot see anything different from any other posts. I can add comments to the posts myself, the "Comments" area in the post editing form work, but obviously that is not available to regular users.
I've spent a lot of time looking at the posts in edit mode, and the author's user accounts, and I cannot see what is different.
Help?