I am not exactly a expert on LCD technology, but I have a fairly decent understanding of it. I have a Palm TX and was playing with an IR Monitor program that will detect any form of infared. I noticed that when my 12" iBook's screen dims it would cause my IR monitor to go off, but only when it dims. When the screen brightens it quits; lowering the brightness manually it recreated the same effect. I thought maybe the backlight emmits more infared then visible as the voltage is dropped; anyone know why?