the problem you are facing should be present in all browsers.
maybe other browers you are trying have some files in cache.
indeed, that's a known problem, about the rawr template using files in folder you cannot access (because unauthorized).
we didn't come to a final solution yet.
in the while you may like to add this line just after [unauthorized] (in the template)
<style>{.load|/template/{.!theme.}/code/{.!theme.}_main.css.}</style>