We just launched a new company site for a client. After chasing down some "OMG it looks wrong now!" complaints, we determined that the CSS (and some images, perhaps more) is getting blocked by their firewall. They claim this never happens to them with any other sites, but the effect is consistent across their network, and can't be reproduced outside.
It's not a very big site. Everything is being served from the same server, running a minimal PHP-based CMS, and the client never reported a similar problem during testing from our server. Is this likely to be anything we can fix, or is this solely a problem for their IT?
Best Answer
Maybe it's just a proxy/caching issue? Could it be that the old site had some static resources with the same name that where heavily cached?
If that's the case the IT department could try to empty the proxy cache. Or, if there is no proxy, tell users to empty their browser cache.
Another thing you could check: maybe some files have the wrong file permissions on your web server and you - being authenticated in some way - don't get the HTTP status 403 Forbidden.
Tell the users to request one of the images directly in the browser's address bar and see what kind of error they get (firewall or web server).