Not sure if this is a common thing or something you guys have come across, but now and again I see a very slight flash(light & dark) on the screen. It happens only for a split second and tends be on bright scenes. I'm seeing it more now as I'm constantly looking out for it. At first I thought it maybe a bad mains feed, but have recently bought isol-8 mains filter with leads, which didn't solve it. I doubt it's my connections as I've checked them and use decent cables, besides it happens on DTV and DVDs.