title: Rails 4 Assets Bug, not loading images
body: <p>To cut a long story short, because I wasted enough time with this stupid framework.
  I want to use pure CSS, no SCSS, no css.erb, no mumbo-jumpo that adds more overhead parsing, even if it is 2ms more.</p>
  
  <p>My production.rb file has (I am using webrick):</p>
  
  <pre><code>Properties::Application.configure do
    # Settings specified here will take precedence over those in config/application.rb.
  
    # Code is not reloaded between requests.
    config.cache_classes = true
  
    # Eager load code on boot. This eager loads most of Rails and
    # your application in memory, allowing both thread web servers
    # and those relying on copy on write to perform better.
    # Rake tasks automatically ignore this option for performance.
    config.eager_load = true
  
    # Full error reports are disabled and caching is turned on.
    config.consider_all_requests_local       = false
    config.action_controller.perform_caching = true
  
    # Enable Rack::Cache to put a simple HTTP cache in front of your application
    # Add `rack-cache` to your Gemfile before enabling this.
    # For large-scale production use, consider using a caching reverse proxy like nginx, varnish or squid.
    # config.action_dispatch.rack_cache = true
  
    # Disable Rails's static asset server (Apache or nginx will already do this).
    config.serve_static_assets = true
  
    # Compress JavaScripts and CSS.
    config.assets.js_compressor = :uglifier
    # config.assets.css_compressor = :sass
  
    # Do not fallback to assets pipeline if a precompiled asset is missed.
    config.assets.compile = false
  
    # Generate digests for assets URLs.
    config.assets.digest = true
  
    # Version of your assets, change this if you want to expire all your assets.
    config.assets.version = '1.0'
  
    # Specifies the header that your server uses for sending files.
    # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
    # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
  
    # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
    # config.force_ssl = true
  
    # Set to :debug to see everything in the log.
    config.log_level = :info
  
    # Prepend all log lines with the following tags.
    # config.log_tags = [ :subdomain, :uuid ]
  
    # Use a different logger for distributed setups.
    # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
  
    # Use a different cache store in production.
    # config.cache_store = :mem_cache_store
  
    # Enable serving of images, stylesheets, and JavaScripts from an asset server.
    # config.action_controller.asset_host = "http://assets.example.com"
  
    # Precompile additional assets.
    # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
    # config.assets.precompile += %w( search.js )
  
    # Ignore bad email addresses and do not raise email delivery errors.
    # Set this to true and configure the email server for immediate delivery to raise delivery errors.
    # config.action_mailer.raise_delivery_errors = false
  
    # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
    # the I18n.default_locale when a translation can not be found).
    config.i18n.fallbacks = true
  
    # Send deprecation notices to registered listeners.
    config.active_support.deprecation = :notify
  
    # Disable automatic flushing of the log to improve performance.
    # config.autoflush_log = false
  
    # Use default logging formatter so that PID and timestamp are not suppressed.
    config.log_formatter = ::Logger::Formatter.new
  end
  </code></pre>
  
  <p>Now I have a simple css file under assets/stylesheets called general.css, and it contains this simple line:</p>
  
  <pre><code>html{
      background-image:url('homepage_bg_1.jpg');
  }
  </code></pre>
  
  <p>Now I have tried:</p>
  
  <pre><code>background-image:url('assets/homepage_bg_1.jpg');
  background-image:url('public/assets/homepage_bg_1.jpg');
  background-image:url('public/homepage_bg_1.jpg');
  background-image:url('assets/images/homepage_bg_1.jpg');
  </code></pre>
  
  <p>Nothing works!! It browser still looks for a 'homepage_bg_1.jpg' image which is normal, but in my public assets folder I have 'homepage_bg_1-de4a0800c51d578f152fe5ca821136a6.jpg'.</p>
  
  <p>I am using <code>RAILS_ENV=production bundle exec rake assets:precompile</code> to precompile my assets.</p>
  
  <p>Now I would assume that Rails is not stupid enough, and will look for that file. But it doesnt. Can somebody just tell me what's wrong with this framework? Should I open an issue in Github? Is the framework trying to make us not use CSS?</p>