Hi Alex,

I played around with this a little, and the only way I could find to get it to work was to use a DrawFilter:

        public class MyDrawFilter : IUIElementDrawFilter
        {
            #region IUIElementDrawFilter Members

            bool IUIElementDrawFilter.DrawElement(DrawPhase drawPhase, ref UIElementDrawParams drawParams)
            {
                // The only time we will ever get in there is for the BeforeDrawForeGround phase
                // of an EditorWithTextDisplayTextUIElement in a TemplateAddRow where there is
                // NullText applied. 
                return true;
            }

            DrawPhase IUIElementDrawFilter.GetPhasesToFilter(ref UIElementDrawParams drawParams)
            {
                // Watch for an EditorWithTextDisplayTextUIElement 
                if (drawParams.Element is EditorWithTextDisplayTextUIElement)
                {
                    // Get the cell. 
                    UltraGridCell cell = drawParams.Element.GetContext(typeof(UltraGridCell)) as UltraGridCell;

                    // If the cell is not null, and it's in the TemplateAddRow, and there's 
                    // a NullText applied to it, return the BeforeDrawForeGround phase. 
                    if (cell != null
                        && !string.IsNullOrEmpty(cell.Column.NullText)
                        && cell.Row.IsTemplateAddRow
                        && (cell.Value is DBNull || cell.Value == null))
                    {
                        return DrawPhase.BeforeDrawForeground;
                    }
                }

                // Return None so the DrawFilter does nothing in any other case. 
                return DrawPhase.None;
            }

            #endregion
        }