I am having an issue that one might call flicker, but it isn't so much flicker as it is random or periodic brightness changes. For example, when I first start the phone by pressing "menu", the screen is bright for a moment and then it throttles back to a more subdued level of brightness. That is likely the power settings settling in, but I am not sure After waiting the configured time for the screen to shut off (which I think is 30 seconds), the screen will become noticeably brighter for a second or two and then shut down.
The above is subjective and anecdotal. But, something that is not is the behavior of the screen with two separate "flashlight" programs: One simply called "FlashLight" by "flash-in-the-brain" and "Color Flashlight" by "Social and Mobile". I an not inferring that either of these two applications are buggy or causing the issue, I am merely pointing out the behavior in question is exhibited consistently and in a way that can be reproduced while using both apps. If you invoke either app and then attempt to set the brightness toward the maximum side of the spectrum, it will display momentarily, but then fade or reduce in intensity once you move your finger away from the screen or stop moving your finger. For example, if I run "Color Flashlight" and then invoke the "brightness" setting, the screen does become brighter once I begin moving my fingers across the selection bar at the bottom of the screen, but once I stop moving my finger or if I remove my finger from the screen, the display becomes dimmer.
This is the sort of thing I notice and it is troublesome to me. It simply may be a power setting change that is required, but it is no less annoying. Any other "flickers" or fades I have noticed are too anecdotal to mention, but they are there. If anyone has noticed this or has solved it with a setting, let me know. If I figure it out I will post the solution.