Homer is driving the Krusty clown school loan car late at night. The view cuts to him talking about the job, then he get pulled over by Wiggum. when Wiggum gets out, Homer is driving the Simpsons family car (the pink/purple looking one).
The flower in Homer's Krusty shirt disappears when the real Krusty shows up at the mob place.
Krusty's breast implants disappear when he gets back to America.
When Don Vittorio gives Krusty his two dollars change from the fifty dollar bill, he appears to hand him three bills. However, the bills are clearly folded in half.
When Homer opens the door to the Italian restaurant, the decorative panels on the door disappear and it's a plain door.
The whole plot stems around Krusty hiding from the mob because he owns them $48. But the expenses he incurs in his running/hiding, including overseas travel and breast implants, would cost considerably more than the amount of money he owes the mob.