The same bicycle with whitewall tyres and drop handlebars features in three disparate locations, first being tripped over, later outside Petit Albert, and one other scene.
At 32 minutes and 10 seconds into the film, Chief Inspector Jules Maigret and two other inspectors follow a lead to the Au Petit Albert pub. Maigret puts a black glove on his right hand to open the door to the pub.
They all enter the pub and investigate inside.
While looking around, one of the inspectors finds a picture frame on a dresser and picks it up with his bare left hand as Maigret stands to the inspector's right side looking on at the picture.
The movie then cuts to a close-up shot of the picture frame showing the pictures. In this close up shot, the inspector's left hand is seen holding the left side of the picture frame, as he shows the picture to Maigret standing to his right side.
The inspector then asks Maigret (while the movie holds the close up on the picture frame) "Do you recognize anyone." At this time Maigret's bare, non-gloved left hand is seen coming into the bottom of the frame to grasp the picture frame.
Just as Maigret grabs the picture frame, the movie then immediately cuts to a wide shot at a low angle showing the inspectors looking at the picture frame.
The continuity goof is now clearly visible at this point because Maigret is now holding the picture frame with his now gloved, right hand.
Since the cut was a seamless straight cut which immediately carried the the scene, there was not time for Maigret to switch the picture frame to his right hand.
This is the continuity error.
On a side note, both inspectors initially handle the frame (before the continuity goof) with their bare hands which can leave their fingerprints on the outside of the picture frame.
This handling of the picture frame with their bare hands negates the initial concern Maigret implied when first putting on his right hand glove when opening the door to the pub.
They all enter the pub and investigate inside.
While looking around, one of the inspectors finds a picture frame on a dresser and picks it up with his bare left hand as Maigret stands to the inspector's right side looking on at the picture.
The movie then cuts to a close-up shot of the picture frame showing the pictures. In this close up shot, the inspector's left hand is seen holding the left side of the picture frame, as he shows the picture to Maigret standing to his right side.
The inspector then asks Maigret (while the movie holds the close up on the picture frame) "Do you recognize anyone." At this time Maigret's bare, non-gloved left hand is seen coming into the bottom of the frame to grasp the picture frame.
Just as Maigret grabs the picture frame, the movie then immediately cuts to a wide shot at a low angle showing the inspectors looking at the picture frame.
The continuity goof is now clearly visible at this point because Maigret is now holding the picture frame with his now gloved, right hand.
Since the cut was a seamless straight cut which immediately carried the the scene, there was not time for Maigret to switch the picture frame to his right hand.
This is the continuity error.
On a side note, both inspectors initially handle the frame (before the continuity goof) with their bare hands which can leave their fingerprints on the outside of the picture frame.
This handling of the picture frame with their bare hands negates the initial concern Maigret implied when first putting on his right hand glove when opening the door to the pub.
The surname of the examining magistrate Comeliau is mispronounced throughout as "COMM-el-oh", when it should be "Comm-ELL-ee-oh".
When photographing the body thrown from the car, the police photographer takes flash photos in quick succession, obviously using an electronic flash and not changing bulbs.
Goderville is not in Picardie, it is in Normandy.