Moving a ToolWindow when the DPI of the Window 7, 8 is higher then 100% causes incorrect offset to the mouse pointer to by applied. This issue leads to the following unexpected behaviors when ran under Window 8 OS: When the: - DragDropMode is set to Deferred. The compasses are not hidden after reorder. - AllowDragReorder is set to True. In this scenario you should be able to reorder tabs without the need to float team. The incorrect offset causes them to be floated making it impossible to reorder tabs as expected.