      * instead.
      */
     private var _playheadTime:Number = 0;
+    
+    [Inspectable(minValue="0.0")]        
     
     /**
      *  Current time position of the effect.

	 */
	mx_internal var durationExplicitlySet:Boolean = false;

    [Inspectable(category="General", defaultValue="500")]
    
    /** 
     *  @copy mx.effects.IEffect#duration

    //  startDelay
    //----------------------------------

    [Inspectable(category="General", defaultValue="0", minValue="0")]

    /**
     *  Amount of time, in milliseconds, to wait before starting the effect.
