title: How do I fix an (Errno::EINVAL) error when installing rails 3?
body: <p>I am trying to install rails 3.0.0. and am getting this error during install.  Anyone have any clue how to work around this?</p>
  
  <pre><code>C:\Ruby187\bin&gt;gem install rails -v 3.0.0
  Successfully installed activesupport-3.0.0
  Successfully installed builder-2.1.2
  Successfully installed i18n-0.4.1
  Successfully installed activemodel-3.0.0
  Successfully installed rack-1.2.1
  Successfully installed rack-test-0.5.4
  Successfully installed rack-mount-0.6.13
  Successfully installed tzinfo-0.3.23
  Successfully installed abstract-1.0.0
  Successfully installed erubis-2.6.6
  Successfully installed actionpack-3.0.0
  Successfully installed arel-1.0.1
  Successfully installed activerecord-3.0.0
  Successfully installed activeresource-3.0.0
  Successfully installed mime-types-1.16
  Successfully installed polyglot-0.3.1
  Successfully installed treetop-1.4.8
  Successfully installed mail-2.2.6
  Successfully installed actionmailer-3.0.0
  Successfully installed thor-0.14.0
  Successfully installed railties-3.0.0
  Successfully installed bundler-1.0.0
  Successfully installed rails-3.0.0
  23 gems installed
  Installing ri documentation for activesupport-3.0.0...
  Installing ri documentation for builder-2.1.2...
  ERROR:  While generating documentation for builder-2.1.2
  ... MESSAGE:   Unhandled special: Special: type=17, text="&lt;!-- HI --&gt;"
  ... RDOC args: --ri --op C:/Ruby187/lib/ruby/gems/1.8/doc/builder-2.1.2/ri --tit
  le Builder -- Easy XML Building --main README --line-numbers --quiet lib CHANGES
   Rakefile README doc/releases/builder-1.2.4.rdoc doc/releases/builder-2.0.0.rdoc
   doc/releases/builder-2.1.1.rdoc --title builder-2.1.2 Documentation
  (continuing with the rest of the installation)
  Installing ri documentation for i18n-0.4.1...
  Installing ri documentation for activemodel-3.0.0...
  Installing ri documentation for rack-1.2.1...
  Installing ri documentation for rack-test-0.5.4...
  Installing ri documentation for rack-mount-0.6.13...
  Installing ri documentation for tzinfo-0.3.23...
  Installing ri documentation for abstract-1.0.0...
  Installing ri documentation for erubis-2.6.6...
  Installing ri documentation for actionpack-3.0.0...
  Installing ri documentation for arel-1.0.1...
  Installing ri documentation for activerecord-3.0.0...
  ERROR:  While executing gem ... (Errno::EINVAL)
      Invalid argument - ./&lt;/cdesc-&lt;.yaml
  </code></pre>