ok, a little more info: I have, for instance, Flow Studio set to always display on the "External Monitor". If I iconify it and all other programs running over on that monitor, then press the screen depth gadget in the "Ambient Screen", the "Ambient Screen" will be duplicated over on the "External Monitor" screen. I verified this with two programs running (iconified both: Iris and Flow Studio), then, I cannot get over to that second "duplicated screen" unless I un-iconify the running program(s), at which point everything returns back to normal.