Corrected entry: As the Once-Ler is floating down the water heading to the waterfall, the Lorax rolls a boulder down and the bed is flung down the waterfall and the Once-Ler survives. But in the next shot they are sleeping back on the bed in his room.
Corrected entry: When Ted goes to visit the Once-ler for the second time, he does not have a bag of marshmallows. When he arrives at the Once-ler's house, he does.
Correction: No, the first time he visited he brought the offering of the old snail and such. Then the marshmallows the second time.
Corrected entry: In the opening credits song an O'Hare worker does the splits on top of the O'Hare car. The shot then moves to the crowd and he is no longer there, but when it cuts back to the car he is on top of it again. (00:04:10)
Correction: The O'Hare worker is still on the car. He is just obscured by the credits.
Correction: Actually, once the Once-ler leaves to go to sleep, he realises that he's missing his bed and heads back to find it. So, it could've been possible that he found his bed.