Magoo's runny tattoo changes constantly.
The pants Magoo reels in from the water dry instantly.
The man removes the outer money jacket twice.
In the chopper, Luanne's gun is aiming up, however she shoot down twice.
In the chopper, Luanne has 2 money jackets in her hands. When she loose them both, we see there are 4 already in the water. However, she dropped nothing until that moment.
Mr Magoo comes to a stop frozen stiff on the edge of a large drop. Waldo bumps into him and as he flys over the edge his arms are flayling.
The live action version of Magoo looks nothing like his cartoon counterpart. When the cartoon intro transitions into live action ,Magoo has gone from being bald and short to having hair and is much taller. And at the end of the movie when live action transitions back into the cartoon - Leslie Nielsen's Magoo shrinks and goes back to being the short bald cartoon version. It made no sense .
In the opening animated sequence, Magoo's words often don't match his lips.
After Mr. Magoo steps off the paddle steamer, a cameraman is clearly visible in the following aerial shot on a raft under the dock.
When Magoo is about to go after Luanne on the ironing board, someone clearly gives him a push start.
In the early helicopter scene in Brazil, the helicopter's registration number is "C-FHJJ." Canadian aircraft registration numbers start with "C-F". Brazilian aircraft registration numbers start with "P".
In the first scene with the ruby, Luanne says "Exquisite!" to which Morgan responds "Actually, it's corundum, which is an aluminum oxide." Luanne says "'Exquisite' is an adjective, not an element." Corundum isn't an element either - it's a compound.
Mr Magoo is supposed to be bald as in the cartoon yet Leslie Nielsen's portrayal of Magoo has hair.