In my application, I've set the Cache-Control response header for all pages to "no-cache, no-store, must-revalidate". Fiddler can capture that header correctly for all the static pages, but it only manages to catch "no-cache" for my AJAX calls. Is this an issue with Fiddler or with AJAX itself? Does AJAX not have the other 2 flags in its header? Or is Fiddler intentionally ignoring them because they don't apply to AJAX calls?