ListGrid padding issue

I have problem with cell padding in ListGrid widget.
By default padding is set to value 2. In both Firefox (ver 5.0) and IE (ver 9.0) there is no white space around cell contents. I’ve tried setting cell padding by setCellPadding method to some higher values but with no effects.
I’ve check by firebug html content of listgird (print-screen in attachment)
Structure of table is

<table cellpadding=5...>
<tr>
<td style='width: x'>
<div style='width: x'>
<nobr>Cell content

All cells (td) has fixed width set to some value (x), and the same width is set for div inside td elements even though table element has cellpadding=5. As i’ve checked also by firebug in SmartGWT showcase in all examples of listgrid, table element has same html structure as one above but width of div inside td element has width equals td width-cellpadding*2. So if cellpadding=2 and td width = 300, div width = 296. In that case everything works just fine.

There is no cell padding even in the simpliest ListGrid implementation.

ListGrid grid = new ListGrid();
ListGridField field1 = new ListGridField("field1","Field 1",100);
ListGridField field2 = new ListGridField("field2","Field 2",100);
grid.setFields(field1, field2);
	
ListGridRecord record = new ListGridRecord();
record.setAttribute("field1", "test");
record.setAttribute("field2", "test");
grid.addData(record);
	
SimplePanel panel = new SimplePanel();
panel.setWidget(grid);

My listgrid is part of some large existing project written in pure gwt so i need to wrap it into some gwt widget - can this be a problem?

Using GWT 2.4, SmartGWT 2.5