Hi , I recently purchased an iMAC approx 2 months ago. Can anyone tell me why when I apply a video FX feature under "quartz composer", none of these effects actually work? The effect will preview fine, and over top the still in the clips pane is the icon identifying an effect is present. However, after it is apparently rendered, the effect is not present when I view the movie. All other effects work from the videofx list EXCEPT the ones under "quartz composer" which is approx 30 or so good effects. Any suggestions or similar problems? Thanks!!