title: Using standard initial jekyll set up, jekyll serve watch resulting in LoadError
body: <p>I've used the tutorial for Jekyll to set up a very basic blog and have hosted it on the localhost using <code>jekyll serve</code>, but when I use <code>jekyll serve --w</code>, the site generates then command gives </p>
  
  <blockquote>
    <p>C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:in 'require': 
    cannot load such file --wdm (LoadError)</p>
  </blockquote>
  
  <p>Followed by a lot of other information </p>
  
  <p>I'm running Ruby 1.9.3 on Windows.</p>