Revealing mistake: The film was rushed to theaters, leaving a few mistakes which Universal fixed. In the original cut, toward the end, Judi Dench's human hand is visible, complete with her wedding ring. This was fixed for the re-release.
Continuity mistake: When Bustopher rolls inside the trashcan, Munkustrap's hat is upside down. A shot later, it has turned 180ยบ.
Continuity mistake: When Bustopher grabs the lobster, Mr. Mistoffelees is holding his hat with his right hand. A shot later, he is in a different position and he holds the hat with his left hand.
Other mistake: Whenever a cat puts a hat on, there are no cuts for the ears to pop through. Instead, the ears simply swap from being on the cat to being on the hat between frames. Sometimes, when the cat's head is a bit too high, the ears on the hat are sometimes slightly misplaced.
Continuity mistake: When Victoria is released from her bag, it lies around both of her feet. When the shot changes it lies next to her right foot.
Continuity mistake: Gus closes the curtains with both hands but from the opposite shot he is only using his left hand.
Continuity mistake: When Victoria, Mungojerrie and Rumpleteazer enter a home and jump on the bed, a cat walks up the headboard and laughs. Victoria is lying with her tummy on the bed but a shot later she is kneeling.
Continuity mistake: When Bustopher is on the plank and another cat is on the opposite side holding a towel (or something similar) the length of the part behind changes from short to long with no continuity between shots.
Continuity mistake: Bustopher falls backwards on the lid and slides down facing a 6 o'clock position. When the shot changes he is in an 8 o'clock position.
Continuity mistake: Jennyanydots says Bustopher wants to reborn to eat again. He points at her with his right hand and then bends his arm. When the shot changes his arm is extended again and he is repeating the previous movements.
Continuity mistake: When Bustopher comes out of the trash can and sings "I'm frequently seen" Mr. Mistoffelees slides down the can from the top to the bottom. When the shot changes he is on the upper part again.
Continuity mistake: When Jennyanydots sees Bustopher she slaps his tummy and raises her left arm. When the shot changes it's lowered.
Continuity mistake: When introducing Jennyanydots, Munkustrap says "and that's what makes..." and Jennyanydots smacks a can. The cat on top has one leg on top of the other or not, depending on the shot.
Continuity mistake: When Jennyanydots is scratching her thighs a strand of wool is stuck to her foot or not, depending on the shot.
Continuity mistake: When we're introduced to Jennyanydots there's a strand of wool falling right through the middle of the yarn. A shot later it is behind the yarn.
Continuity mistake: Outside on the railroad tracks, when Skimbleshanks sings "When Skimble was about and on the move" Victoria's position changes in every single shot: First she is sitting sideways with her legs on the left side of the tracks, then she is looking straight at him and, finally, her legs are suddenly on the right side.
Continuity mistake: When Skimbleshanks sings "Of the Sleeping Car Express" the number of cats around has no continuity: Sometimes there's none, others one that suddenly swap to three.
Continuity mistake: Skimbleshanks sings "for the Northern" and the cats approach the railroad tracks. In the immediate shot, when he sings "hemisphere" the cats are away and approach again.
Continuity mistake: When Victoria lays in bed with the two cats the pink cushion on the left has feathers all over. In the immediate following shot there are feathers only on the upper part of the cushion. Then it swaps back to the previous shot.
Continuity mistake: When Bustopher sings "I am still in my prime" all the trash and mess on the floor magically disappears and everything is neatly piled on a circle for him to stand on.
Answer: The issue wasn't about her hand looking human but, as you mentioned, that she was wearing her own ring, which was digitally removed in the revised version.
raywest ★