title: Error When Trying to Open a URL in Ruby on Rails
body: <p>Environment: Ruby 1.9.2, Rails 3.0.3, Ubuntu</p>
  
  <p>When I try to open a URL using:</p>
  
  <pre><code>open("http://www.cnn.com")
  </code></pre>
  
  <p>I get the following error:</p>
  
  <pre><code>Errno::ENOENT: No such file or directory - http://www.cnn.com
      from (irb):9:in `initialize'
      from (irb):9:in `open'
      from (irb):9
  </code></pre>
  
  <p>(It's a difficult topic to search). This is happening in both irb and in my app. It used to work under Ruby 1.8.7 and Rails 2.3.4 but it appears that something has changed.</p>