Revealing mistake: When the Enterprise is leaving its docking station and pulling out, two little bugs or debris from the model lands on the camera lens on the lower left corner (corrected in the Director's Edition).
Revealing mistake: The shot of the Enterprise finally clearing free of the dry-dock shows a supporting pylon protruding from the starboard side of the engineering section of the starship miniature. (Corrected in the Director's Edition).
Revealing mistake: When Spock's shuttle is lining up to dock with the Enterprise, look below the shuttle and you can see the hydraulic mechanism used to maneuver it.
Revealing mistake: When V'Ger first appears on the bridge as a column of light, you can see that the two sides of the image don't match up, because they tried to splice the special effects person who was moving the column out of the shot.
Revealing mistake: As the pod carrying Kirk and Scotty aligns itself to dock with the Enterprise, a ghost-image of the support stand for the miniature can be seen following the model beneath it.
Revealing mistake: When Spock is on Vulcan, it is blatantly obvious the actors playing the Vulcan elders are speaking English with a bad dubbing.
Revealing mistake: As Pod 5 goes over the Enterprise in the Inspection cruise so Kirk can see the refit results, as the camera looks toward the Earth and the nacelles, you can see the blue of Earth through the inside of the nacelle.
Revealing mistake: As the ship gets close to the camera leaving space dock, you can see the interior lights of the model through the torpedo launcher opening.
Revealing mistake: After leaving space dock, the Enterprise is shown flying by the camera. As it does, there is a shaft of blue light directly underneath the ship. This can only be a poorly disguised pole under the model. (Corrected in the Director's Edition.)
Revealing mistake: When the shuttle pod makes its first pass on the port side of the space dock (starboard of the shuttle) a piece of the earth shows over the last strut as the pod passes (blu-ray and Netflix version).
Revealing mistake: As they prepare for Warp speed the man is touching control buttons on the console in Engineering. If you look closely, as he touches them, the entire panel reacts to his touches, suggesting that all the lighted buttons and the surface are all one piece.
Answer: Deltans exude an intensely potent and effective chemical substance known as pheromones, which act as signals arousing an intense sexual reaction in other species (in other ST material it's inferred that its potency is so extreme that a non-Deltan risks insanity in a sexual encounter with a Deltan). Upon entering Starfleet, Deltans must swear "an oath of celibacy" so as not to influence or take advantage of crewmembers. That is why Lt. Ilia stated that her "oath of celibacy" was on record.
Super Grover ★