[Qt-interest] QTabWidget CSS bug?

[Peter Radagast]

Hello!
I need to have different CSS for QTabWidget's pane for left and top tab positions.
The documentation states that 
The :top, :left, :right, :bottom pseudo states depending on the orientation of the tabs.
But when I try to use them like

QTabWidget:left::pane 
{ 
  <any CSS tags>
} 
 QTabWidget:top::pane
{
  <any CSS tags>
}
It just doesn't work. Even when I try to style QTabWidget itself via QTabWidget:left{} and  QTabWidget:top{} - nothing changes! And when I apply same CSS tags to  QTabWidget{} or  QTabWidget::pane{} it works. So should I report this as a bug? I didn't find an existing bug report in the task tracker which seems rather strange because IMO this is very noticable.