I'm migrating my application to Rails 3.1 and I use the blueprint css framework. As seen in the setup instructions at blueprint's github page there's is a condition that needs to be true for the ie.css file to be included. In rails 3.1 we place our stylesheet files (either .css or .scss) in app/assets/stylesheets. Application.css contains these two important lines: /* *= require_self *= require_tr

