README.md in ember-cli-rails-0.0.14 vs README.md in ember-cli-rails-0.0.15

@@ -113,14 +113,18 @@
 
 Your Ember application will now be served at the `/` route.
 
 ## Additional Information
 
-EmberCLI Rails runs `ember build` with the `--output-path` and `--watch` flags
-on. The `--watch` flag sets tells EmberCLI to watch for file system events and
-rebuild when an EmberCLI file is changed. The `--output-path` flag specifies
-where the distribution files will be put. EmberCLI Rails does some fancy stuff
-to get it into your asset path without polluting your git history.
+When running in the development environment, EmberCLI Rails runs `ember build` 
+with the `--output-path` and `--watch` flags on. The `--watch` flag tells 
+EmberCLI to watch for file system events and rebuild when an EmberCLI file is changed. 
+The `--output-path` flag specifies where the distribution files will be put.
+EmberCLI Rails does some fancy stuff to get it into your asset path without
+polluting your git history. Note that for this to work, you must have
+`config.consider_all_requests_local = true` set in
+`config/environments/development.rb`, otherwise the middleware responsible for
+building Ember CLI will not be enabled.
 
 ## Contributing
 
 1. Fork it (https://github.com/rwz/ember-cli-rails/fork)
 2. Create your feature branch (`git checkout -b my-new-feature`)