title: Google Earth (.kmz) mime type IIS issue
body: <p>I am experiencing a peculiar issue with IIS and KMZ files. I have added the MIME type to IIS and it works just fine -- however, seemingly randomly the MIME type is removed. This has happened a few times now, and each time all I have to do to fix the issue is just add the MIME type again.</p>
  
  <p>The issue is identified when broken links are reported, and as soon as I add the MIME type back in all is well.</p>
  
  <p>Any thoughts on what is causing it, or methods for finding out what's causing it?</p>
  
  <p>Thanks!</p>