We're using Moodle 2.3.2.
Suddenly -- since yesterday -- our site admin users are unable to see the course list when clicking on "site home" on our site's main page. I've quizzed all of our site admins, and no one has made any changes to any settings. I've turned on debugging, and nothing has shown up. I've made sure that "Admin View" is set to "Admin user sees all courses" in Site Administration -> Plugins -> Blocks -> Courses. I've also tried disabling this and re-enabling it, but that didn't help.
Any ideas, anyone?