1) frame 3320 to about 3395 there is a noticeable shimmy to the leading left side of the nose of the star destroyer above the Tantive. ovously you've masked here and something is ever so slightly showing through from the background.
2) frame 3600, the laser flash is tinted and not pure white.
3) motion tracking between tatooine and the atmosphere haze in the master establishing shot is off and doesn't line up right. the haze still has motion after the planet has stopped moving. its only a few frames out but....
also the curvature of the haze doesn't match the planet.