When a RadDock control is dragged to the bottom of a page, the page will start scrolling.
Request new properties for the RadDockZone to allow the display of a message, image, or style when no docks are present in the zone along the lines of the EmptyMessage property of the RadInput control. The properties could be: "EmptyZoneMessage", "EmptyZoneImage" and "EmptyZoneCssClass". See the following thread from 2010 where a solution to this was discussed: http://www.telerik.com/forums/empty-raddockzone-message
It will possible to manually invoke the saving and loading of the dock state when the built-in dock state persistence is used in order to avoid the automatic saving and loading of the state on each postback.
The RadDock will be moved with the cursor when the scroll wheel is used while dragging the control.