IE9 standard view no load CSS
css, internet-explorer-9
Solution
IE9 is known to reject stylesheets which are not sent using "text/css" MIME type. This is a new security enhancement, but it's catching a few people off guard. Is your CSS file dynamically generated? Make sure its getting passed as 'text/css'.
More info: http://blogs.msdn.com/b/ieinternals/archive/2011/03/27/http-406-not-acceptable-php-ie9-standards-mode-accepts-only-text_2f00_css-for-stylesheets.aspx
Another try:: It's not just 'text/css' in the doc that needs to be correct, you need to make sure your local IIS is sending it with the proper headers. "If a style sheet is ignored due to an incorrect MIME-type, your site may fail to render as expected. Text, images, or other features may lack the desired styling. If a style sheet is ignored because it does not bear the correct MIME-type, a notification will be logged in the IE9 F12 Developer Tools console."
http://msdn.microsoft.com/en-us/library/gg622939%28VS.85%29.aspx
IE9 Not applying linked style sheets
Problem
I have this problem and maybe I'm not the only.. If I test my website on FF, Chrome, Safari, IE7, IE8 is perfect. On IE9 (standard view) It doesn't load CSS files. If I switch on Compatibilty view it works fine... How can I show the CSS on the standard view as well? Thanks