Audio problem: When the Enterprise fire the torpedo, the sound used is the old series sound used when the ship's phasers were fired, not the correct noise for a torpedo firing.
Other mistake: Spock lifts his crew mates with the rocket boots. He passes deck numbers 35 through 78 from bottom to top. First off, deck numbers go from top to bottom. The bridge is on deck 1. Second, the Enterprise of that class only had 23 decks.
More quotes from Star Trek V: The Final Frontier
Trivia: This probe which the Klingon ship destroyed is either the Pioneer 10 or 11. This is based on the plaque it carries. The Voyager 1 and 2 spacecraft, launched a few years after the Pioneer spacecraft, had a child on their plaques along with the man and woman.