Continuity mistake: When Stan pulls the tablecloth off the table whilst Oliver is trying to retrieve the key from Mugsy, at the far end of the table you can see a cup fall off the saucer. In the next shot, the cup is back on the saucer again.
Continuity mistake: When Oliver pulls down the chimney pipe from the stove, he is hit by a cloud of soot. At this point, you can see that the top of Oliver's hat is clean, but when Stan appears in the next shot, his hat is now covered in soot.
Continuity mistake: When we see Oliver reading his newspaper at the beginning of the short, the door behind him is open. In the next shot, the door is closed, and in the following shot, the door is open again.
Continuity mistake: When Arthur Houseman takes out the water from the jug and replaces it with gin, you can see there are two glasses in front of the jug, but when we see him pouring gin into the jug in the next shot, the glasses have changed position.
Continuity mistake: When Oliver falls into the fountain with the wooden crate, you can tell the crate is empty because it is floating. But when we see a close-up of Oliver in the next shot, the crate has been weighed down and is not floating.