Hi Federico, Thank you for your additional comment on this bug.
I don't think it is the same problem as in the original report. The error you see in irb comes from the fact that you run your session in a directory which doesn't contain a Gemfile to describe the dependencies of your project. In particular it is not the same error as the one in the initial bug report, where I suppose that a Gemfile was present with dependencies not corresponding to installed packages/gems. If you want to start jekyll, invoking bundler is not needed. You should be able to start a new site by just typing: $ jekyll new foo in the terminal. Can you confirm that you can start a new site, or can you be more specific in what you were expecting from the Bundler.setup command? Best wishes, Cédric
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