Looks like the area of higher detail around the cape didn't load right. What I noticed in AMSO is during reentry sometimes the earth strobes a little, probably a frame rate issue, but it doesn't bother me all that much.
Did you change any of the parameters? I noticed too much ambient light makes the textures freak out. And a suggested setting for the fullscreen video is disable pageflip, for me it keeps the strobing surfaces to a minimum. I've only seen it once in the last 10 or 15 times I've played the sim.