Case Types page 'blank'
FIXED. I have CiviCRM installed on a subdomain. Using the advice in this answer: https://civicrm.stackexchange.com/a/21878/6594 I changed the URLs on the 'Resource URLs' page (Administer > System Settings > Resource URLs) from relative URLs with shortcode (ex. [civicrm.files]/persist/contribute/) to absolute URLs (ex. http://***.******.org/wp-content/uploads/civicrm/persist/contribute). That made all of the pages that were appearing blank work properly.