Update: Refinery CMS version 2.0.2 was just released which fixes the page parts bug mentioned in this episode. No need to do the work-around in the console.
Note: If you have trouble accessing the home page of a Refinery site, ensure the trailing "/" is present like http://localhost:3000/. There is an advanced option you can toggle to change this behavior. See this post for more information.
brew install imagemagick
gem install refinerycms