Problem with selectable option

I find that the following code is causing script errors:

        $("#my-k-grid").kendoGrid({
            dataSource: {
                data: mydata
            },
            change: onMyRowSelected,
            selectable: "multiple, row",
            pageable: false,
            scrollable: true,
            navigatable: true,
            columns: mycols
        });

If I trap the exception, I get a TypeError: "Object doesn't support this action"

If i comment out the use of the selectable option, I don't get an error, however cells are selectable and I would prefer multiple row selection.

I am using the 2012Q1 build.  Everything was previously working correctly using the 2011Q3 build.

EDIT: I am trying to use the kendo chart elsewhere on my page.  Therefore I have the following included in addition to kendo.web.min.js:
kendo.core.min.js
kendo.data.odata.min.js
kendo.data.xml.min.js
kendo.data.min.js
kendo.dataviz.core.min.js
kendo.dataviz.vml.min.js
kendo.dataviz.svg.min.js
kendo.dataviz.chart.min.js

If I remove these script includes, I do not get the 'selectable' error however my chart doesn't load.

Previously When I was on 2011Q3 I would just include kendo.all.min.js but that is not available to me anymore.