I'm running a "flat" development (pre template integration) site inside my Episerver build. These pages are SSI (*.shtml). Unfortunately and this seems specific to Episerver the response header reports they are "Content-Type application/octet-stream" usually (in normal IIS SSI operation) they are server correctly as "Content-Type text/html". I've cofigured ISS > site > properties > HTTP Headers > (MIME) File Types to have .shtml text/html. Is there somewhere else I need to look to change this behaviour?