Thanks Brandybuck. I gave what you suggested a try. My custom style redraws groupboxes and scrollbars. Setting the style directly on the groupboxes works beautifully. However, it still doesn't work on the scroll bar area and that confuses me.

I'm sure my QStyle code is correct, because when I set the style on the QApplication object, everything comes out how its supposed to, groupboxes and scrollbars alike.