I recently run into a problem - I deleted a user and since there was number zero in the Posts column on /wp-admin/users.php I thought that he has no posts or pages. So I didn't selected "Attribute all posts and links to some other user" option.
Later I discovered that there are several pages missing on my site. So what's the deal with the pages? Posts column on /wp-admin/users.php is simply showing just the number of the posts, what about pages? This can lead to some serious confision and troubles.
Please help, thanks!