phpBB • Free and Open Source Forum Software

Hello, I am having some issues getting most of the style graphics to appear to logged in users. The Site Administrator can see all the images correctly when logged in and I must make note that when logged out, all of the graphics are seen as well.

However the normal members (non-admins) cannot see most of the graphics. Even from a fresh clean install most of the graphics do not appear when "logged in", however they do appear when "logged out".

I was told this issue is 100% external to the codebase that this software is running on, which brings me to phpBB.

The website is here: https://auth.deadmonkeycoalition.com/forums
And as you can see everything works fine for guests.
Logged Out & Main Admin Logged In:
When Non Admins are Logged In:
The header image goes away and most of the style graphics also disappear. Any ideas what could be causing this?

I am running the following:
Ubuntu 14.04 Server (64 bits)
Database server: MySQL(i) 5.5.53-0ubuntu0.14.04.1
Board version: 3.1.10