The deactivated panels of the accordion have display: none which cause problem in initial rendering of the pqGrid.
There are 2 ways to solve this:
1) Create accordion after creation of pqGrids.
http://jsfiddle.net/LAgZx/328/or
2) use activate event of accordion to refresh the corresponding grid in the activated panel as in code below:
activate:function( event, ui ) {
var $grid=ui.newPanel.find(".pq-grid");
if($grid.data('pqrefresh')==null){
$grid.pqGrid('refresh').pqGrid('refresh');
$grid.data('pqrefresh', true);
}
}
http://jsfiddle.net/LAgZx/327/