I'm supporting a WordPress site. I am able to Preview a post (draft and published) but my client is not, while using the exact same credentials to log in to the site, which is an Admin user. We both use FF13 and have tried deleting cookies, clearing cache and logging back in to WP. The problem persists for her. Since she's the one maintaining content, it's critical that she can do preview. I read a bunch of posts related to similar issues but none seem to be fitting this description since I am able to view Preview just fine on my machine. Any ideas besides clearing cache and trying it on a different browser?