When Fred is first shown in his Nutcracker costume after emerging from the frog suit during the pageant, he is wearing a fake blonde mustache in to match his hair. But in all shots afterwards, the fake mustache is black.
Tina gets lowered down by Daphne to give Snowball the cat back to Mr. Nickelby on stage. When she reaches the floor after giving Mr. Nickelby his cat, the rope vanishes just before the next shot.