Continuity mistake: When Gambit notices Cody on the monitor, the pink rectangular patches on his pants that are normally horizontal are now vertical. (00:10:30)
Factual error: Wolverine is able to call the mansion from a payphone without depositing any money, nor is he shown to be using a prepaid phone card or making a collect call. (00:09:40)
Continuity mistake: The Colony's Acanti ship goes from having its face buried into the walls of the chasm and its body above ground to having its body partially buried in the valley floor and its face free from the wall. (00:06:50 - 00:08:10)
Revealing mistake: Wolverine's nipples literally disappear from his chest when he says "Do I feel lousy." (00:07:15)
Continuity mistake: Rogue's vanity has a teddy bear and a telephone on it. When Gambit comes into her room, the phone has disappeared. (00:03:55)
Continuity mistake: When Wolverine is being surrounded by the aliens, he is standing by a cactus plant. When the shot changes the cactus has disappeared. (00:03:15)
The Lotus and the Steel - S4-E13
Continuity mistake: Shoulder pads appear on Jubilee's coat at the end of the episode. (00:19:45)
The Lotus and the Steel - S4-E13
Continuity mistake: Wolverine tears off the red sun portion of the Silver Samurai's costume. Moments later it has reappeared. (00:19:30)
The Lotus and the Steel - S4-E13
Other mistake: The Silver Samurai slashes Wolverine in the back with his sword twice and Wolverine reacts in pain, yet there are no tears in Wolverine's shirt afterwards. (00:19:05 - 00:19:50)
The Lotus and the Steel - S4-E13
Continuity mistake: When the biker discovers the children hiding in the tree, his motorcycle is parked right next to the tree with the left side of his motorcycle facing the pit. When he gets back on the motorcycle, it is suddenly several feet away from the tree and the front wheel is facing the pit. (00:16:30)
The Lotus and the Steel - S4-E13
Continuity mistake: The amount of fish that fall out the net is more than could have fit into it. (00:16:25)
The Lotus and the Steel - S4-E13
Continuity mistake: When the biker gang is raiding the village towards the end of the episode, the leader of the gang alternates between having two spikes on each shoulder of his jacket, having them only on the left shoulder, or having none at all. (00:15:55)
The Lotus and the Steel - S4-E13
Continuity mistake: The village elder Yoshida-san suddenly has sideburns and a goatee when Soichi is mocking Wolverine. He is clean-shaven for all other parts of the episode. (00:07:25)
The Lotus and the Steel - S4-E13
Other mistake: The camera is out of focus when the Silver Samurai threatens the villagers. (00:09:35)
The Lotus and the Steel - S4-E13
Deliberate mistake: Every native of the Japanese village that Wolverine visits is conveniently fluent in English, and they even speak English to each other when no other people from English-speaking countries are around. (00:04:45 - 00:20:45)
The Lotus and the Steel - S4-E13
Revealing mistake: The footage of Jubilee flying off in the mini-jet is recycled footage of her flying Colossus back to Russia from the season 4 episode "Red Dawn." You can even make out Colossus' silhouette in the window over the passenger seat in one shot, even though Jubilee is supposed to be by herself. (00:07:35)
The Lotus and the Steel - S4-E13
Other mistake: When Wolverine is telling Xavier about his road rage incident, his jeep is missing its windshield. (00:03:20)
Have Yourself a Morlock Little Christmas - S4-E12
Continuity mistake: Rogue's headband is flesh-colored when Beast says "It would appear that my face is not the world's most reassuring." (00:16:30)
Have Yourself a Morlock Little Christmas - S4-E12
Continuity mistake: When Leech is first shown in his sick bed, he is shirtless and under the sheets. When he begins receiving a blood transfusion from Wolverine, he is fully clothed and also wearing a beanie. Given the weak and near-death state he was in, it's extremely unlikely the other Morlocks would bother dressing him. (00:09:20 - 00:14:15)
Have Yourself a Morlock Little Christmas - S4-E12
Continuity mistake: The brown patch on Ape's left leg disappears when he gets up to assist in Wolverine's blood transfusion for Leech. (00:13:15)
Answer: Chris Potter, the original Gambit voice actor, did indeed quit the role in the 4th season. His last episode was The Phalanx Covenant Part 1 so it seems reasonable that Fox would limit the use of the character even though it was recast. It doesn't appear that Potter left the role due to animosity, he stated in an interview that he wished to play Gambit in the first live action X-Men film.
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