When Tweety is riding the disguised horse as the Lone Ranger, he tosses his hat away in a closeup shot shouting "Hi Ho, Sliver! Away!". However, in the very next shot, his hat his back on his head.
In a few frames around the 2:14 mark, you can see the outside of the frame as it shakes, revealing a portion of the rotating table and peg bar.
For a split second when the 2 cats are about to climb the pole, the yellow cat's muzzle is yellow instead of tan.