Had problems with gem therubyracer on my windows, ended up manually installing a version built for windows (therubyracer-0.11.0beta1-x86-mingw32), and manually moving some of its dll files to my ruby gems directory, as per the instructions at https://github.com/hiranpeiris/therubyracer_for_windows.\n  I also had gem relationships issues with my version of rails, I think I did a 'gem update --system' to resolve it.\n  I also had trouble with catalog_controller.rb's require 'rubygems', which seemed to be an issue with bundle changing the $: load paths.   This was reselved with the super janky addition of the line, just before that require, of \n$: << "c:/Ruby193/lib/ruby/gems/1.9.1/gems/nokogiri-1.6.0-x86-mingw32/lib"\n After that, the problem was fixed.  Later, I tried to replace that janky lines with a much more elegant 'require rubygems' and it also worked, and then I removed that line as well, and it STILL worked, so I don't know WTF, maybe I have a chached version of the page from after the appending to LOAD_PATHS.  For now I'm not checking in my change to the controller.