Summary

When configuring NGINX proxy to add 'X-Content-Type-Options nosniff' header, IE 10,11 will not be able to display the Space Blueprint images.
This problem does not happen on Chrome.

Environment

Reproduced in 5.8.17 and 5.9.4

Steps to Reproduce

1. Install Confluence
2. Install NGINX
3. Follow the steps here to configure NGINX proxy
4. add this to the configuration add_header X-Content-Type-Options nosniff; after the proxy_pass
5. Restart NGINX
6. Restart Confluence
7. Login to Confluence in IE 10 or 11
8. Open the Create dialog using the 3 dots ...

Expected Results

Space Blueprint images should appear properly.

Actual Results

Space Blueprint images don't show

Workaround

1. Comment out this add_header X-Content-Type-Options nosniff; from the configuration file.
2. Use Chrome instead of IE