If you get this Error Message:
ActionView::Template::Error (blueprint/ie.css isn't precompiled)
Than that means that your ie.css isn’t precompiled 🙂
No. Seriously. If you get this message, probably you are running on production and your css files are not precompiled. Take a deeper look to the Assets Pipeline in Rails 3.1.X. If your css and js files are in the right place, you can fix this error message by executing this command here:
rake assets:precompile
Or with JRuby:
jruby -S rake assets:precompile
That should generate all precompiled css and js files and fix the problem.
Robert Reiz 