Misblamed: There have been fans complaining about Mikey and Gus's "new voice actors" in the film. Both of them has the same voice actors they did in the show, but sound different due to puberty (Courtland Mead's [Gus] voice was beginning to break, and Jason Davis' [Mikey] voice had already broken). The only member of a gang with a new voice is T.J.
King Freddy II is this for fans of King Bob. Though he's seen as this in-universe.
Meta example: A lot of Recess fans hated Myles Jeffrey's portrayal of T.J., due to his voice being too high and lacking the spunk Ross Malinger and Andy Lawrence gave him previously.
They Changed It, Now It Sucks: Myles Jeffrey replacing Andrew Lawrence (and, to an extent, Ross Malinger) as the voice of T.J. was not very well-liked among fans and is often seen as a reason why this movie isn't well-liked.