title: MongoDB find returns nothing
body: <p>I'm starting learning and using MongoDB. I'm following a basic sample consisting creating a collection with one document. So I first switched to a test db using <code>use testdb</code>.
  Then I executed this command in order to insert a new document into a new collection:</p>
  
  <pre><code>db.websites.insert({ name: "homepage", _id: "http://www.html.it", tags: ["Development", "Design", "System"]});
  </code></pre>
  
  <p>This command returned to me: <code>WriteResult({ "nInserted" : 1 })</code></p>
  
  <p>Finally I wanna show the last inserted document using</p>
  
  <pre><code>db.website.find()
  </code></pre>
  
  <p>But, (and this is the problem), it returns me nothing!! No errors, no documents...</p>
  
  <p>Any suggestions?</p>
  
  <p>Thanks</p>