QT controller when Buffer is true

[Colin Holgate]

I'm not surprised by this, it's the same in other tools, but when a  
QuickTIme object is set to Buffer, the controller can't be used. The  
thumb does progress as the movie plays, but as it can't be dragged,  
and none of the other controller features can work, should the  
controller be visible at all?

Obviously I can hide it, and do my own custom buttons, I was just  
making sure that indeed the controller isn't supposed to work when  
Buffer is true.