Get "Object reference not set to an instance of an object" when clear messages in editor (4241609)

In the Editor's Message tab, when I right click in the tab and select 'Clear', I get the following error.

System.NullReferenceException
Object reference not set to an instance of an object.
Stack Trace:
   at Quest.Toad.ScriptResults.ScriptOutputControl.toolTipController_GetActiveObjectInfo(Object sender, ToolTipControllerGetActiveObjectInfoEventArgs e)
   at DevExpress.Utils.ToolTipController.OnGetActiveObjectInfo(ToolTipControllerGetActiveObjectInfoEventArgs e)
   at DevExpress.Utils.ToolTipController.OnControlMouseMove(Object sender, MouseEventArgs e)
   at System.Windows.Forms.MouseEventHandler.Invoke(Object sender, MouseEventArgs e)
   at System.Windows.Forms.Control.OnMouseMove(MouseEventArgs e)
   at DevExpress.XtraGrid.GridControl.OnMouseMove(MouseEventArgs ev)
   at System.Windows.Forms.Control.WmMouseMove(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at DevExpress.XtraEditors.Container.EditorContainer.WndProc(Message& m)
   at DevExpress.XtraGrid.GridControl.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)