Continuity mistake: When Gambit is saying "Scott and Jean pick one strange romantic hideaway," the encircled X on Rogue's right shoulder is entirely red, when the X and the circle around it should be black. (00:11:39)
Continuity mistake: The prosecutor for Beast's trial is wearing a pink suit. When the unruly civilian is being escorted out of the courtroom, in a wide shot, the prosecutor's suit is now white. (00:08:29 - 00:10:22)
Night of the Sentinels: Part 1 - S1-E1
Continuity mistake: When Jubilee's foster father is showing his wife what Jubilee did to the VCR, the glass door for the entertainment shelf goes all the way to the top. When the wife is asking her husband if he is sorry they took in Jubilee, the glass door is now only tall enough to cover the bottom and middle shelves. (00:02:17)
Continuity mistake: When Warren Worthington's fireplace is first shown, it is depicted as being raised off the floor and surrounded by masonry on all sides, with a wooden floor in front of it. When he is telling his girlfriend that she wouldn't want to get close to him, the fire is closer to floor-level, and the masonry that was underneath the fire is now a slab on the floor. (00:02:07 - 00:02:30)
The Unstoppable Juggernaut - S1-E8
Continuity mistake: When Jean Grey is saying "What if the professor's in there," her hand is colored blue, when it should be flesh-colored. (00:02:36)
The Unstoppable Juggernaut - S1-E8
Continuity mistake: When Xavier's message begins playing, Jubilee is sitting down, and Storm and Rogue are standing side by side. When the shot changes, Jubilee is standing up, and Storm is now in front of Rogue. (00:03:46)
The Unstoppable Juggernaut - S1-E8
Continuity mistake: When the X-Men begin attacking Juggernaut one by one after he emerges from the rubble, there is some rubble directly in front of him. When Colossus hits him from behind, Juggernaut goes stumbling forward and the rubble that was in front of him has disappeared. (00:17:14)
The Unstoppable Juggernaut - S1-E8
Continuity mistake: The building that Strom drops on Juggernaut is gray. When Juggernaut emerges from the rubble moments later, it is brown. (00:16:35 - 00:16:57)
The Unstoppable Juggernaut - S1-E8
Continuity mistake: When Juggernaut is telling Jubilee that she's getting too big for her britches, she is standing on the right side of the roof. A couple of shots later when Juggernaut is tearing the building out of its foundation, she is now on the opposite side of the roof. (00:14:57)
The Unstoppable Juggernaut - S1-E8
Continuity mistake: When Wolverine is telling Jubilee not to antagonize Juggernaut, his mouth closes. When the shot changes, his mouth is hanging open. (00:14:42)
The Unstoppable Juggernaut - S1-E8
Continuity mistake: When Juggernaut is stealing the stacks of cash from the bank vault, the money is more yellow in color. When Wolverine slashes open the bags and the cash spills out, the money is now green. (00:12:29 - 00:13:52)
The Unstoppable Juggernaut - S1-E8
Continuity mistake: When the guards are about to slip on the trail of ice Storm created, one guard is white, and the other is black. When the shot changes to them sliding into the wall, both are now white. (00:12:09)
The Unstoppable Juggernaut - S1-E8
Continuity mistake: When Rogue and Storm are about to enter the cell block, the gate is black. When they open the gate, it is silver. (00:10:18)
The Unstoppable Juggernaut - S1-E8
Continuity mistake: When Beast is reading the book in his jail cell, the spine is in the correct place. He then closes the book, and when the shot changes, the spine is now on the opposite side of the book. (00:10:52)
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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