Its all OK with 200's except for a couple of 304 and 307 for text/plain types and the css font family Ubuntu... I sorted by status to verify and there are no 403 or 404 errors.
I would rather not use a proxy if it is unnecessary. It works like a charm in firefox. I also tested the web server config that removed and replaced the fonts MIME/type registrations, but had no change on the publication server. I am stumped?
I could host it externally for testing or send you the app in a ZIP for testing if you thinks it a worthwhile investigation and you are up for it!