Gemfile to assist with problem diagnosis of capybara-screenshot

Gemfile

source 'http://rubygems.org'

gem "rails", "~> 3.1.1"
gem 'mysql2'
gem 'json'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails', " ~> 3.1.4"
  gem 'coffee-rails', "~> 3.1.1"
  gem 'uglifier', '>= 1.0.3'
end

gem "devise"
gem "devise_invitable"
gem "haml", ">= 3.1.3"
gem "haml-rails"
gem "jquery-rails"
gem "therubyracer"
gem 'capistrano'
gem 'capistrano-ext'
gem 'fog'
gem 'airbrake'
gem "cancan"
gem 'fastercsv'
gem 'ckeditor'
gem 'paperclip'
gem "truncate_html", "~> 0.5.1"
gem 'awesome_nested_set'
gem "friendly_id", "~> 4.0.0.beta8"
gem "zencoder"
gem "videojs_rails", :git => "git://github.com/bseanvt/videojs_rails.git"
gem "acts_as_list"
gem "nested_form", :git => "git://github.com/ryanb/nested_form.git"
gem "fastercsv"
gem 'rails3-jquery-autocomplete'
gem "will_paginate"
gem 'sunspot', '1.2.1'
gem 'sunspot_rails'
gem 'sunspot_test'

group :development, :test do
  gem "mongrel"
  gem "rspec-rails"
  gem "capybara"
  gem 'ruby-debug'
  gem 'database_cleaner'
  gem 'factory_girl_rails'
  gem 'cucumber-rails'
  gem 'ci_reporter'
  gem 'autotest-rails'
  gem 'launchy'
  gem 'email_spec'
  gem 'shoulda-matchers'
end

group :test do
  gem 'capybara-screenshot'
end

group :development do
  gem 'zencoder-fetcher'
end

Stacktrace

/home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/capybara-1.1.1/lib/capybara/cucumber.rb:6: undefined method `World' for main:Object (NoMethodError)
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:240:in `require'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:240:in `require'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:223:in `load_dependency'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:640:in `new_constants_in'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:223:in `load_dependency'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:240:in `require'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/capybara-screenshot-0.1.0/lib/capybara-screenshot.rb:1
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in `require'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in `require'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in `each'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in `require'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in `each'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in `require'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/bundler-1.0.21/lib/bundler.rb:122:in `require'
	from /home/graeme/Code/epra/config/application.rb:13
	from /home/graeme/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
	from /home/graeme/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
	from /home/graeme/Code/project/config/environment.rb:2
	from /home/graeme/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
	from /home/graeme/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
	from /home/graeme/Code/project/spec/spec_helper.rb:3
	from /home/graeme/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
	from /home/graeme/.rvm/rubies/ree-1.8.7-2011.03/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
	from /home/graeme/Code/project/spec/helpers/events_helper_spec.rb:1
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `load'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `load_spec_files'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `map'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `load_spec_files'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/rspec-core-2.6.4/lib/rspec/core/command_line.rb:18:in `run'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:80:in `run_in_process'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:69:in `run'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:11:in `autorun'
	from /home/graeme/.rvm/gems/ree-1.8.7-2011.03@project/gems/rspec-core-2.6.4/bin/rspec:4