title: NSPredicate not working with array of dictionaries
body: <p>I have an NSPredication with format like this:<code>@"Status CONTAINS[cd] shipped"</code></p>
  
  <p>I have an array of dictionary, here's an example:</p>
  
  <pre><code>{
          {
          Category = "Category 4";
          Comp = "Category 4";
          Depth = 02;
          Grade = New;
          Length = 02;
          Location = "Thousand Oaks, CA";
          Name = "3ply Mat";
          Owner = "Owner 3";
          PUP = 2;
          Status = Shipped;
          "Unit Number" = 20110507113852351;
          Width = 02;
      },
          {
          Category = "Category 4";
          Comp = "Category 4";
          Depth = 02;
          Grade = New;
          Length = 02;
          Location = "Thousand Oaks, CA";
          Name = "3ply Mat";
          Owner = "Owner 3";
          PUP = 2;
          Status = Shipped;
          "Unit Number" = 20110516094641587;
          Width = 02;
      }
  )
  </code></pre>
  
  <p>But it's returning an empty array. What am I doing wrong? Thanks</p>