Corrected entry: During the mashed potatoes scene, Lt. Valeris demonstrates that it's impossible to fire a phaser on board the Enterprise without setting off a ship-wide alarm. However later in the film, she murders the two assassins, Burke and Samnoe using, according to McCoy, "a phaser on stun at close range." Yet no alarm sounded in the ship, alerting the crew that a phaser had been fired on board. (01:20:50)
Corrected entry: If only two months went by between the explosion of the Klingon moon and the meeting at Starfleet Headquarters, when exactly did Chang and his cohorts have the time to construct the bird-of-prey that can fire while cloaked? Two months would not have been long enough to build such a vessel, and since there was no reason for the peace talks until after the moon exploded, there would be no reason to have such a vessel being built before the events of the movie happen.
Corrected entry: Valeris informs the crew that her comrades will make sure to jam ship to ship transmissions, yet minutes later the Enterprise is able to contact the Excelsior. In addition, why wouldn't the Excelsior contact Khitomer to warn them of the impending assassination attempt? (01:27:40 - 01:30:35)
Corrected entry: When Lt. Valeris is exposed as a conspirator, she states to Kirk: "'Let them die' you said. Did I misinterpret you?" However she could not have known this, because when he said it he was alone with Spock (after the original mission briefing at Starfleet Headquarters). (00:11:05 - 01:23:45)
Corrected entry: Towards the end of the film, the Enterprise is getting an audio/visual transmission from Captain Sulu on the Excelsior. You see Captain Sulu on a big screen. Female Vulcan, Lt. Valeris, is standing right in front of the screen. You can see a ledge at the bottom of the screen, and her shoulders are even with the ledge, and she's near the middle of the screen. Then they switch to a shot of Captain Kirk, and then back to a closer shot of the screen. This time, Lt. Valeris has disappeared. You can see the bottom ledge and the middle of the screen. Then there's another shot of Kirk, then back to the screen, with Lt. Valeris magically back again.
Corrected entry: In the scene where Lt. Valeris finds the gravity boots, at the end of the scene she attaches them to the locker door. Just before she places the boots on the door, you can see velcro or some other kind sticky material on the locker door.
Corrected entry: When Valeris slides down the pole, the corridor wall shakes when she bumps it.
Corrected entry: After the first conference with the president of the Federation, all the men file out of the room, save Ambassador Sarek, who can be seen sitting in a chair beside the president's desk. In this shot, the president reaches for his eyeglasses. The very next shot cuts to the president taking off the glasses, showing the side of his desk where Sarek was sitting - but Sarek isn't there, and nor is his armchair.
Corrected entry: In his log entry at the beginning of the movie, Captain Sulu mentions that he has been commanding the Excelsior for three years on a mission in Beta Quadrant. In the next scene, as they walk into the briefing at Starfleet Command, McCoy asks where Sulu is. Kirk has to remind him that Sulu is now a captain, and on assignment. It seems odd that McCoy wouldn't have known that, or that he would have expected Sulu at a briefing taking place very far away from the location of Sulu's mission.
Corrected entry: Enterprise hits the prototype Bird Of Prey with a torpedo they build with the equipment they're carrying for categorizing gaseous anomalies. At the beginning of the film, we hear that its actually the Excelsior that is out on a mission categorizing gaseous anomalies. Considering Enterprise was at dock and the crew decommissioned, its unlikely they would have had the equipment on board.
Corrected entry: When Praxis explodes, it's real bad luck that the Excelsior is on the same level as the two-dimensional expanding shock wave. Couldn't the crew bring the ship easily out of the way by moving it "up" or "down"?
Corrected entry: In the beginning of the movie, Sulu's Captain's Log (voice-over) tells how his ship, Excelsior, is cataloging gaseous anomolies. Later, when the Enterprise has no way to fire back against a Klingon ship that can fire while cloaked, Ohura says, "What about all that equipment we're carrying to catalog gaseous anomolies?"