Continuity mistake: When Spike grabs Tom's whiskers and threatens him, the background behind them changes from a fence to blue sky between shots.
Other mistake: The calendar on the wall in Porky's kitchen shows April as having 31 days instead of 30.
Continuity mistake: When Tweety is running away from Sylvester, he hides in a tube of "Badminton Birds." When Sylvester comes around the corner, you can see there is a racquet next to the tube, but when we see Tweety coming out of the tube in the next shot, the racquet has disappeared.
Continuity mistake: In a full view of the oven, inside the oven door the chicken's legs are white, but in the next shot, the legs are now brown.
Continuity mistake: After Tom has torn up Jerry's diary, you can see that the pie is next the hole of Jerry's home, but when Jerry comes around the corner and sees Tom, the pie is now positioned near Tom's foot.
Continuity mistake: In this first Mr. Magoo animated short, Waldo is playing a four-string banjo. Throughout the cartoon, the number of strings keeps changing. Sometimes there are three and sometimes there are only two.
Continuity mistake: At the beginning of the cartoon, the perfume shop seller has a flower in his right hand while riding on his bicycle, but in the next shot the flower has disappeared.
Continuity mistake: When the three pigs are reading a book at the beginning of the cartoon, the front cover has "Children's Stories" on the red rectangle, but in the next shot the words have disappeared.
Audio problem: When Bugs Bunny does the fake dive, you can hear Bugs whistling but his mouth isn't moving.
Continuity mistake: Before Elmer's two dogs shake hands on agreeing to catch Daffy, one of them draws a diagram which is a dotted line and a circle with a cross in it. After the two dogs run into a tree, they go back to their meeting point and this time the diagram is completely different to the one drawn before.
Continuity mistake: When the fox is holding a bottle of Atomic Powder during his audition towards the end of the cartoon, his fingers on the bottle change position between shots.
Continuity mistake: When the mouse (hidden in a vase) tiptoes on the table at the start of the short, the bread on the plate is initially pointing up, but in the next shot it is pointing down.