Change tab during drag and drop operation

[Ginsengelf]

Hi, I have two dockwidgets in a MainWindow. I can use drag and drop from one to the other if both are visible (e.g. one docked on the left side and the other on the right side). But if the dockwidgets get stacked and a tabbar appears, drag and drop does not work anymore because the tab does not change when I drag onto it.
Can I change this behaviour? (Qt 4.7)

1122011219

Thanks,

Ginsengelf