Other mistake: During the opening credits (right after the fish chopping shot) two bearded gentlemen meet in the street. As they part, Lord Barkis suddenly appears behind them. But where did he come from? He didn't walk in from either side, we would have seen him. Nor was there any door he might have come through.
Other mistake: In the scene where Victors mom and dad start singing "its a wonderful day for a wedding Victors dad puts a dead fox around his wife's neck. Just after that scene the fox has got its leg in it's mouth while in the other scene it hadn't.