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 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 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
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: 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
Continuity mistake: Shoulder pads appear on Jubilee's coat at the end of the episode. (00:19:45)
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)
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)
Revealing mistake: When Rogue's phone is ringing you can see that the phone is halfway absorbed into her mirror. (00:04:15)
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)
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: When Gambit notices Cody on the monitor, the pink rectangular patches on his pants that are normally horizontal are now vertical. (00:10:30)
Audio problem: With the exception of the last word in the sentence, Cody's mouth is completely closed when he says "They need us Rogue, just like I need you." (00:13:40)
Audio problem: When Wolverine says "I'm going to get this outta me!" his mouth is wide open for most of the line. (00:14:05)
Other mistake: The tail that Rogue grows appears out of thin air as if it were magic. Given that she's going through an organic transformation, the tail should have formed gradually out of her coccyx. (00:15:55)
Other mistake: After Rogue absorbs Wolverine's healing powers and purges the transformation spores from her system, she reverts back into human form including losing the tail that she grew. Given that the tail protruded from her backside, there should have been a hole in the back of her pants afterwards, yet there is none. (00:16:40)
Secrets, Not Long Buried - S4-E15
Plot hole: At the speed Cyclops is traveling in his mini-jet when he passes Watchdog's tower, he would have been long out of range before Watchdog could force him out of the air into a crash landing, considering that Watchdog had to take time to alert Solarr of Cyclops' presence and be ordered to knock him out of the air. (00:02:30)
Secrets, Not Long Buried - S4-E15
Revealing mistake: Instead of staying in place, the energy surging around Watchdog's head moves down the screen as the camera pans down. (00:02:35)
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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