I've noticed since I upgraded the software on my 4805 that it now flickers in brightness on low light scenes. I never noticed this before the software upgrade and now it intermittently (every few seconds) has brighter flashes. Counting the time intervals reveals times of between 15 and 40 seconds between flashes. My projector is in ceiling and economy mode and has the contrast 63 and brightness 55, all else is factory default. There is still less than 300 hours on the projector. Is anyone else getting this please? Cheers, Bob.