Continuity mistake: When Dorothy, Blanche, and Sophia are sitting in the reception area arguing with Kirsten, Sophia sits forward and says she loves Rose as if she was one of her own. When she sits forward, you can see the beads on her purse handle are strung tightly. When she leans back in her seat, you can see big spaces between beads, as if some have been taken off.
One Flew Out of the Cuckoo's Nest (2) - S7-E26
Continuity mistake: When Sophia goes around taking pictures of Dorothy and Lukas kissing, she accidentally takes a picture of Rose and Blanche hugging. When she takes the picture, they are still hugging and see her afterwards. When the picture develops, they are both staring at the camera with shocked looks, but the picture was already out when they turned around.
Answer: Ice makers were a new invention, advertisement purposes.