anchor.diff:  constructor TJvDockCustomPanel.Create(AOwner: TComponent);
   begin
     inherited Create(AOwner);
  +  // csParentBackground will be removed after the initial drawaing of the control
     ControlStyle := [csAcceptsControls, csCaptureMouse, csClickEvents,
       csSetCaption, csParentBackground, csOpaque, csDoubleClicks, csReplicatable];
     Color := clBtnFace;
  
positive.code: begin
    SetDockSite(Self, False);
    inherited Destroy;
  end;
  
  function TJvDockCustomPanel.CreateDockManager: IDockManager;
  
negative.code: 
    TJvDockCustomPanel = class(TJvDockCustomControl)
    protected
      procedure WMEraseBkgnd(var Message: TWmEraseBkgnd); message WM_ERASEBKGND;
      function CreateDockManager: IDockManager; override;
    public
      constructor Create(AOwner: TComponent); override;
  