Corrected entry: During the opening dream sequence on the "Planet of the Donuts", we get our first glimpse of the monster donut that will eat Homer when his shadow looms over Homer. In this shot the shadow is of a "regular" donut, i.e., one with a hole. In the next shot we see that the monster's hole area has teeth and is filled in with black; in other words, its hole is a regular mouth. As such it could not have had light shining through it to make the donut hole in his shadow.
Corrected entry: There were five judges at Homer's court martial, however, four of them walk away, so there should be one left, but all five chairs are empty.
Correction: There is no requirement that they show every judge walking off. Since the judges who speak are shown in mid-shots that do not allow us to see all of them at once, there is no reason to think the 5th judge could not have walked off quietly without speaking while we were watching one of the others.
Correction: It is a dream. Dreams don't make any sense and are not bound by any laws of reality. The donut could have grown teeth and a mouth between shots.
Rlvlk