Regression in 9.1p smartclient for export as excel

we are using Version v9.1p_2014-04-10/PowerEdition Development Only (2014-04-10).

I have a Grid with date columns. while exporting to excel, date column comes up with unexpected text.

For Example, if the date is 4/12/2014 21:48, After exporting it comes like toU2411ort4AMt2012ti02012.


Following is the code used to export the grid

_gridObject.exportClientData({
exportAs : "xls",
exportDisplay : "download",
exportFilename : EXPORT_FILENAME + ".xls"
})

Field configuration
<field name="createDate" type="datetime" dateFormatter="toUSShortDatetime" title="System Date" defaultDisplay="true" labelCode="test.test" />



This is not happening in older version