DataSource.query results in TypeError

[Ryan]

I've got the following code that works well for initial load.  Once I execute .query I receive "Uncaught TypeError: Cannot read property '0' of undefined".  Kendo UI Mobile v2012.1.322

Am I using .query improperly?

Datasource/bind/sample data:

var ds = new kendo.data.DataSource({

  transport: {

    read: {

      url: "http://localhost:3000/api/anagram",

      dataType: "jsonp",

      data: {

        format: 'html',

        rack: '---'

      }

    }

  },

  group: 'length',

  pageSize: $('#pageSize').val(),

  page: $('#page').val(),

  sort: {field: 'word', dir: 'asc'},

  schema: {

    data: 'words',

    total: 'count',

    model: {

      fields: {

        length: {

          type: 'number'

        },

        word: {

          type: 'string'

        },

        wordFormat: {

          type: 'string'

        }

      }

    }

  }

  //serverFiltering: true,

  //filter: { field: 'rack', operator: 'eq', value: 'ab-' },

  //serverSorting: false,

});

 

function resultsBind() {

    console.log('Fetching...');

     

    ds.fetch(function(){

      console.log('Actually fetched');

      console.log(ds.total());

      console.log(ds.totalPages());

      $("#grouped-listview").kendoMobileListView({

          dataSource: ds,

          template: "#= wordFormat #",

          headerTemplate: "${value} Letters"

      });

      $('.prefix').html(ds.total() + ' words found');

    });

     

    $('#apply').click(function(){

      var p = $('#page').val();

      var ps = $('#pageSize').val();

      ds.query({ page: p, pageSize: ps });

    });

     

}

{"words":[{"length":3,"word":"azo","wordFormat":"<em>a</em>zo"},{"length":2,"word":"bo","wordFormat":"<em>b</em>o"},{"length":3,"word":"coz","wordFormat":"<em>c</em>oz"},{"length":2,"word":"do","wordFormat":"<em>d</em>o"},{"length":2,"word":"go","wordFormat":"<em>g</em>o"},{"length":2,"word":"ho","wordFormat":"<em>h</em>o"},{"length":2,"word":"jo","wordFormat":"<em>j</em>o"},{"length":2,"word":"lo","wordFormat":"<em>l</em>o"},{"length":2,"word":"mo","wordFormat":"<em>m</em>o"},{"length":2,"word":"no","wordFormat":"<em>n</em>o"},{"length":2,"word":"od","wordFormat":"o<em>d</em>"},{"length":2,"word":"oe","wordFormat":"o<em>e</em>"},{"length":2,"word":"of","wordFormat":"o<em>f</em>"},{"length":2,"word":"oh","wordFormat":"o<em>h</em>"},{"length":2,"word":"oi","wordFormat":"o<em>i</em>"},{"length":2,"word":"om","wordFormat":"o<em>m</em>"},{"length":2,"word":"on","wordFormat":"o<em>n</em>"},{"length":2,"word":"op","wordFormat":"o<em>p</em>"},{"length":2,"word":"or","wordFormat":"o<em>r</em>"},{"length":2,"word":"os","wordFormat":"o<em>s</em>"},{"length":2,"word":"ow","wordFormat":"o<em>w</em>"},{"length":2,"word":"ox","wordFormat":"o<em>x</em>"},{"length":2,"word":"oy","wordFormat":"o<em>y</em>"},{"length":2,"word":"so","wordFormat":"<em>s</em>o"},{"length":2,"word":"to","wordFormat":"<em>t</em>o"},{"length":2,"word":"wo","wordFormat":"<em>w</em>o"},{"length":2,"word":"yo","wordFormat":"<em>y</em>o"},{"length":2,"word":"za","wordFormat":"z<em>a</em>"},{"length":3,"word":"zoa","wordFormat":"zo<em>a</em>"},{"length":3,"word":"zoo","wordFormat":"zo<em>o</em>"}],"count":30,"input":"zo?"}