                         PLAY_WHEN_HIDDEN_PROPERTY_FLAG, true);
                 }
                 
+                if (videoElementProperties.thumbnailSource !== undefined)
+                {
+                    videoElement.thumbnailSource = videoElementProperties.thumbnailSource;
+                    newVideoProperties = BitFlagUtil.update(newVideoProperties as uint, 
+                        THUMBNAIL_SOURCE_PROPERTY_FLAG, true);
+                }
+                
                 // these are state properties just carried over from an old video element
                 if (videoElementProperties.playheadTime !== undefined || 
                     videoElementProperties.playing !== undefined)

     */
    private static const PLAY_WHEN_HIDDEN_PROPERTY_FLAG:uint = 1 << 7;
    
    //--------------------------------------------------------------------------
    //
    //  Constructor

        else
        {
            videoElementProperties = {source: value};
        }
    }
    
    //----------------------------------
    //  thumbnailSource
    //----------------------------------
    
    [Inspectable(category="General")]
    
    /**
     *  @private
     *  @copy spark.primitives.VideoElement#thumbnailSource
     * 
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    public function get thumbnailSource():Object
    {
        if (videoElement)
        {
            return videoElement.thumbnailSource;
        }
        else
        {
            var v:* = videoElementProperties.thumbnailSource;
            return (v === undefined) ? null : v;
        }
    }
    
    /**
     * @private
     */
    public function set thumbnailSource(value:Object):void
    {
        if (videoElement)
        {
            videoElement.thumbnailSource = value;
            videoElementProperties = BitFlagUtil.update(videoElementProperties as uint, 
                THUMBNAIL_SOURCE_PROPERTY_FLAG, true);
        }
        else if (videoElementProperties)
        {
            videoElementProperties.thumbnailSource = value;
        }
        else
        {
            videoElementProperties = {thumbnailSource: value};
        }
    }
    
