web browser crashed when scrolling the virtualization grid after adding a new row-Collection of common programming errors

Try to build up at this fiddle: http://jsfiddle.net/vojtiik/rDPBu/3/

var grid = $('#grid').kendoGrid({
    height: 300,
    dataSource: {
        data: [
               {check: 1,ip: "10.1.201.3"},
               {check: 2,ip: "10.1.201.3"},
               {check: 3,ip: "10.1.201.3"},
               {check: 4,ip: "10.1.201.3"},
               {check: 5,ip: "10.1.201.3"},
               {check: 6,ip: "10.1.201.3"},
               {check: 7,ip: "10.1.201.3"},
               {check: 8,ip: "10.1.201.3"}
              ],
        schema: {
            model: {
                id: "check",
                ip: "ip"
            }
        }
    },
   columns: [
               { field: "check" },
               { field: "ip" }
              ],
   editable: true,
     scrollable: {
            virtual: true
        }
}).data('kendoGrid');

$('#add').click(function () {
    grid.addRow();
});

EDIT :

Answer from Kendo support :

Adding new elements to a grid with virtual scrolling enabled is not a supported setup. Please keep in mind that you can always submit it in our feedback forum, so it can be taken into consideration for our future releases.