After buying his carrot, Bugs returns to his seat, but there is no carrot.
When Elmer is hunting with the 'Wabbit Detector', it is shown with an antenna on top of the box. The close-ups of the box showing the screen do not have an antenna on top.
The lettering on the wabbit detector changes completely between the wide shot and the closeup.
When Elmer is hunting with his 'Wabbit Detector', there is no sign of a shotgun in his equipment or backpack. After finding Bugs, he grabs one and shoots.
Nickel(s) is misspelled as "nickles" on top of the candy machine price list, but spelled correctly on three lower lines.
When Bugs buys his carrot from the vending machine, he puts in one coin. There is no single-coin combination possible listed on the card, The fewest number of coins possible is two dimes.