Jquery Datatables Multiple Header Issue -

when set datatables have multiple header rows, swidth parameters have been set ignored. there way of telling datatables header should second row rather first? searched , datatables dot net docs , couldn't find anything.

in picture, first column (year) should wider others. works fine when there 1 header row, when there 2 header rows width specified (using swidth) ignored.

this works me on safari, firefox, , chrome: http://jsfiddle.net/zbn3j/

<table id=test>     <thead>         <tr><th colspan=4>cars</th></tr>         <tr><th>year</th><th>unit</th><th>time</th><th>status</th></tr>     </thead>     <tbody>         <tr><td>r1,c1</td><td>r1,c2</td><td>r1,c3</td><td>r1,c4</td></tr>         <tr><td>r2,c1</td><td>r2,c2</td><td>r2,c3</td><td>r2,c4</td></tr>     </tbody>     </table> 

with call datatable:

$('#test').datatable(     {             "aocolumndefs": [{ "swidth": "200px", "atargets": [ 0 ] }]      }); 

how differ code or experience?