dgeb/ember_data_example — pull request #34 by intuitivepixel (2013-03-13 19:12:52+00:00)
Title: Added 'therubyracer' dependency for development 

It was raising an error for me on a mac os x 10.8 visiting the application after starting the server with "rails s".
Adding "gem 'therubyracer'" to the Gemfile and running "bundle install" again solved the problem.