The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Lilandra is boarding her ship in the end, Cyclops and Corsair are in the background, and they are standing straight up. When the shot changes, Cyclops is now hunched. (00:19:08)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Phoenix is telling everyone that the crystal has been sealed, Wolverine's lower half has been miscolored. His trunks and boots should be blue, but have been colored yellow, and his legs should be colored yellow, but are flesh-colored. He's also wearing his mask in this shot, but in the next shot he is not wearing it. (00:17:42)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Phoenix is teleporting everyone out of the M'Krann Crystal, Gambit's gloves are fingerless, when it has been previously shown that the middle and ring fingers are gloved. (00:14:53)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When the action returns to the X-Men battling D'Ken, Gladiator's neck is the same blue color as his hair, when it should be grayish-purple like his face. (00:12:35)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Gladiator is saying "All is lost, Empress," the front of Gambit's neck is flesh-colored, when it should be black like the rest of his cowl. (00:07:29)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Storm is telecommunicating with Xavier, she is standing in front of a gray wall. When the shot changes, the wall is now green. (00:06:24)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Phoenix is telling everyone that the crystal is sealed, Rogue is standing behind Wolverine and Cyclops. A couple of shots later, she is several feet in front of them. (00:17:42)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When the image of the X-Men are shown on a tree, Gambit's pants are the same blue color as his boots, when they should be black. (00:17:02)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: After Jean says goodbye to Cyclops, Wolverine's bare arms are the same yellow color as his outfit. (00:16:39)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Xavier is first shown watching the clips of the destruction happening across the planet, he is wearing a jacket and gloves. When he is shown again around 30 seconds later, he is now wearing a suit and tie. (00:11:20 - 00:11:54)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Jubilee rushes to Xavier to tell him about the black hole sun, Banshee's cape is suddenly missing. (00:06:32)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: Throughout the first four episodes of "The Phoenix Saga" Lilandra has a slightly robotic effect to her voice. In this episode the effect is absent.
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Ch'od asks Corsair what is happening, his normally green lips are colored white. (00:04:10)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: After the Starjammer has crashed onto the surface of the world inside the M'Kraan Crystal, Cyclops is missing his gloves. (00:07:50)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Cyclops says "What can we do?", Wolverine's bare arms are the same yellow color as his outfit. (00:03:40)
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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