Thanks for the input but I don't think that's it. It has nothing to do with backlight clouding or flashlighting, it's more like a flicker. It only happens with LED dynamic control on, it doesn't not happen with it off.
Immediately after the screen brightens up, certain really bright colors, most common with beige/whites, will flicker to dark grey for a split second before returning to normal. ONLY these colors flicker, none of the rest of the screen. For example in a sky, clouds will flicker but the blue sky will stay completely solid.
Honestly it seems like a software glitch with the way LED dynamic control alters the contrast between light and dark scenes, but I'm just suprised I can't find any information on it. Because I notice it a fair bit, and can reproduce it consistently. Other than LED control, the only other setting that will make it go away with LED dynamic control on is to turn the picture down to around 50, and all that really does is get rid of the bright colors that are flickering in the first place.
It's weird. And I can probably live with it, I just want some acknowledgement that my tv isn't the only one this has happened to for my own piece of mind.
I tried to take a video and I couldn't. My samsung galaxy s2 was all I had to record, and it wouldn't pick it up. Mostly because the transition from dark to light messed with the exposure.