The Lion King 1½ (2004) - 4 major mistakes

Continuity: Throughout this movie, some of the characters from the first movie are given new scenes. The problem is that in these scenes they don't look very much like their first movie counterparts. The obvious example here is Nala when she's explaining the whole Simba VS Scar thing to Timon and Pumbaa - her face is not only a different shape, but she's a completely different colour.

Factual error: This may have been considered before drawing it this way, but it's a mistake nonetheless: When Tinkerbell shows up at the end with all the other Disney characters to watch the movie, she is back lit and silhouetted just like everyone else, and so is the pixie dust she is trailing. This is done simply to resemble a dark theater full of patrons, not to play some sort of impromptu guessing game. Her pixie dust has always been luminescent so it should not appear as a shadow against the theater screen. It'd be impossible to be silhouetted to that degree if it gives off its own light.

Other: When Timon meets Rafiki for the first time, Rafiki is hanging upside down, yet his beard is not affected by gravity and remains pointed upwards.

Continuity: When Rafiki is telling Timon "It means - Look beyond what you see", there is a glitch in the shading on Rafiki's left arm just before he moves his palm upwards and gestures. It disappears before he raises his hand.