jQuery Grid Plugin - jqGrid

I noticed if I have a grid, that I can set onSelectRow after initialization, but not ondblClickRow.  Is this intentional, or is this a bug?

I can set ondblClickRow when I initialize just fine, but nothing happens if I call:

     $("#grid").jqGrid('setGridParam', {ondblClickRow: function(rowid,iRow,iCol,e){alert('double clicked');}});

Where as the following works fine:

     $("#grid").jqGrid('setGridParam', {onSelectRow: function(rowid,iRow,iCol,e){alert('row clicked');}});

Here is a fiddle demonstrating this:   http://jsfiddle.net/amorris/yNw3C/