Continuity mistake: Orville the albatross flies the mice with a sardine can attached to his back, however, when he lands at Devil's Bayou, the sardine can disappears after he is hit by Mr. Snoops' fireworks. (00:34:05)
Continuity mistake: When Bernard and Bianca arrive at the airport, and wait for Orville, Bianca removes her coat. Yet when we see her through the window, her coat has reappeared and it then vanishes again. (00:25:15)
Continuity mistake: As Penny sneaks off, Brutus and Nero have collars on, with chains attached to the right side of their necks. In a reverse shot the chains are attached to the left side of their neck. (00:00:40)
Continuity mistake: When it shows the opening shot of the United Nations building, we see a woman in a purple dress enter through the rotating doors. Behind her is a man with a bowler hat on, walking towards the doors, and behind him is a coloured man wearing a fez. Yet when it cuts to a view from inside, the man in the fez is now walking through the doors. Then, the woman in the purple dress, who we saw previously entering the doors and walking into the building, is once again outdoors, entering again with the man in the bowler hat behind her. (00:04:25)
Continuity mistake: When Bernard and Bianca arrive at the airport, they have a suitcase each. They get on the escaltor with the two suitcases, nothing else. Then when they arrive at the top of the escaltor, Bianca now has a pink handbag on her shoulder. (00:23:10)
Continuity mistake: The message from the bottle, written by Penny, has a couple of mistakes. When it falls from the bottle the writing is several inches from the top of the paper and part of the letter says "New York." When it cuts, the writing on the letter starts right near the top of the paper, and it now reads "New Yorc." Also between different shots, the writing on the note changes from being written in cursive to printed. (00:08:45)
Continuity mistake: When Nero and Brutus bring Penny back, they walk through two double doors, one of which is broken, and off its hinges. They are left open, yet when Medusa enters, she walks through the same doors. Not only are they now closed, but the one which was off its hinges is now fixed back on. (00:41:00 - 00:42:00)
Continuity mistake: The two alligators catch Penny and bring her back to the house. They approach Snoops, scaring him. One of the alligators still has the Penny's Teddy Bear in it's mouth. In the next shot, Penny is holding her Teddy. (00:40:50)
Continuity mistake: As Medusa packs her bag, between shots an elastic clip appears, hanging out of the case. (00:21:30)
Continuity mistake: Bianca's seatbelt disappears for one shot, as they sit in the sardine can, before taking off. (00:27:15)
Continuity mistake: After Medusa has spoken to Snoops on the phone, the phone vanishes from the desk in order for Medusa to put her suitcase down on it. (00:21:10)
Continuity mistake: After Rufus tells Bernard and Bianca about Penny, the lantern on the paint can beside Bernard vanishes then reappears. (00:18:05)
Continuity mistake: When Evinrude takes Bernard and Bianca to Medusa's hideout, in the small leaf-boat, Bernard tells Evenrude to wait at the edge of the land and then him and Bianca walk away from the water, past grass and reeds. Then when it cuts and Medusa flies overhead on her motorboat, Evinrude and his leaf-boat, and the grass/reeds that Bernard and Bianca passed, have all disappeared from the edge of the land. (00:41:40)
Continuity mistake: While her underwear is exposed several times, Penny's undergarments are worn over her tights. but when she is seen undressed and donning her nightgown, she is still wearing her underwear but not her tights. There's no way she could have removed her tights without removing her underwear first. (01:17:05)
Continuity mistake: When we see Miss Bianca for the first time, look carefully and you can see she has no whiskers on the end of her nose, but when she puts on her perfume before entering the Rescue Aid Society, whiskers have suddenly appeared.
Continuity mistake: When Bernard and Bianca are waiting for Orville in the airport room, the direction that the volume button on the speaker points keeps changing. (00:24:50)
Continuity mistake: As the coloured man walks towards the United Nations building, he is wearing a red turban, but as he enters the building, his turban is now a fez. (00:04:30)
Continuity mistake: When Bernard and Bianca go to the orphanage, they rummage through a box labelled "Penny", then Rufus finds them and they talk. As Bianca and Bernard climb from out of the box, as Bernard stands on the cardboard flap, his hands are empty. It cuts and now the lantern has appeared in his hand. (00:14:55)
Continuity mistake: Orville is flying, when he's hit by flares. As he goes down, his chinstrap is suddenly undone. When he crashes, it's buckled again. (00:34:00)
Continuity mistake: After Medusa flies off on her motorboat, to find Penny, her headlight that is attached to the left side of the windshield frame disappears for a shot. (00:33:05)
Chosen answer: She may have been very upset with Penny for running away. But she may have also had a talk with her like she does much later in the movie about why she needs her for finding the diamond.