Other mistake: In the first scene when Bo and Luke are practicing with the General Lee, you see Bo using the clutch, but in the next shot both hands are on the wheel. He didn't have any time to move his hands in about a milisecond.
Other mistake: During the carpet bombing, a single bomb quite literally shreds half of a concrete building (at least 5 storeys), but a number of them do not have any special effect on the already wrecked stadium dome. (00:10:20)