'Til Death Do Us Part: Part 1 - S2-E1
Audio problem: When the Friends of Humanity are approaching the mutant that looks like a werewolf, they are saying "No more mutants," and none of them are pressing their lips together to produce the "M" sounds when saying "more" and "mutants." (00:08:37)
Audio problem: When Storm is saying "But I do know that his thoughts were with us today," her mouth isn't moving. (00:19:00)
Audio problem: When Magneto is saying "Strange. What would restore your...," his mouth remains wide open and unmoved after saying "restore," which would make it impossible to then say "your." (00:19:45)
Audio problem: When Barbarus says "Get them!" he says the word "them" without closing his mouth. It's not possible to say "them" without closing your mouth at the end of the word. (00:20:10)
Audio problem: When Jean Grey exclaims "No!" after Ms. Marvel says "This ends now," she is speaking in Ms. Marvel's voice. (00:18:59)
Audio problem: When Beast is saying "If anything happens to her," his mouth is wide open for the last three words. (00:13:15)
Mojovision - S2-E11
Audio problem: When Mojo is twirling around in a circle and saying "Am I standing?" to Major Domo, you can see his mouth is wide open for the entire line. (00:04:10)
Mojovision - S2-E11
Audio problem: When Mojo is saying "Control room, what are you doing up there?", he doesn't press his lips together at the end of the word "room" in order to pronounce the M sound. Instead, he is shown clenching his teeth together. (00:17:19)
Mojovision - S2-E11
Audio problem: When Magneto is saying "the creature attacking the woman," his mouth only moves for the first two words. (00:20:23)
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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