Finally someone else experiencing this problem. I have had this problem for awhile now, even before 4.4.4 I have Wiped Cache Partition and also a FDR. With the initial visit to Verizon, they wanted to do a FDR and I refused to do so at that time.. Well the flashing started getting worse, so I broke down and did a FDR and turns out the problem is still there. I have run in Safe Mode with the problem continuing. I have found that a couple seconds before my screen times out (set at 30 sec.) it flickers really bad but only the bottom half of the screen. I have to turn off Active Display every night at bed time so I don't get that flash of light from the screen keeping me awake. After a night on the charger I have a red or pinkish hue on the bottom half of the screen when the brightness is set to Auto..As soon as I turn off Auto brightness the red-pink hue is gone. Sorry for rambling but maybe this will shed some light on the matter.