         if (textChanged || textFlowChanged || contentChanged)
         {
             lastGeneration = _textFlow ? _textFlow.generation : 0;
-
+            lastContentBoundsGeneration = 0;
+            
             // Handle the case where the initial text, textFlow or content 
             // is displayed as a password.
             if (displayAsPassword)


    /**
     *  @private
     *  Called when the TextContainerManager dispatches a 'compositionComplete'
     *  event when it has recomposed the text into TextLines.
     */

        
    /**
     *  @private
     *  The generation of the text flow that last reported its content
     *  bounds. 
     */
    private var lastContentBoundsGeneration:int = 0;  // 0 means not set
    
    /**
     *  @private
     *  True if TextOperationEvent.CHANGING and TextOperationEvent.CHANGE 
     *  events should be dispatched.
     */
