I'm not sure if this is an "issue" or a "feature." If I disable the selections by setting the following attributes to false,
allowSelections : false,
allowMultipleSelections : false,
showSelectionColumn : false,
then I can no longer sort the first column of data by clicking on it's column label. Is it possible to allow sorting by the first column while selections are disabled, or is that disabled by design?
Here is a fiddle: http://jsfiddle.net/McWatt/vYZQu/3/
This was indeed a bug, thank you for reporting it. A fix has been checked in.