When the panther dries up from his shower, his hand flickers from white to pink a few times.
The drunk shows the AA representative his hidden stash of brown liquor-bottles, plus the blue flask of "devil's rum"; however, when the bottles are shown being discard in the dumpster, the blue flask is not along them.
When Pinky checks his watch at the beginning, a church-type structure with a clock in it appears in the background and chimes twice - except the clock shows one o'clock. It should have chimed the same number of times as the hour - in this case, one time for one o'clock.
The AA representative was a staunch advocate of temperance, and so he would not have helped the man chase after his stash of alcohol that was being taken away in the garbage truck.