Clinton Avenue Memoirs - S5-E16
Continuity mistake: The front door of Sophia's former apartment is on the right wall, under the stairs. The fireplace is on the far back wall to the left, next to the foot of the stairs. But in the earlier episode, "A Piece of Cake", the front door is next to the stairs, there is no fireplace, and Sophia's bedroom door is where the front door is in "Clinton Avenue Memoirs".
Continuity mistake: In this episode, Dorothy's son, Michael, is said to be thirty years old. When he married his wife in the season 3 episode "Mixed Blessings", he was said to be 23.
Other mistake: When Blanche gets her citrus plate in the mail, she receives it in a box. She takes it from the mailman and it shows a normally taped up package, yet she just lifts open the flaps like they aren't even sealed.
Continuity mistake: At Big Daddy's (Blanche's father) funeral/passing, Blanche shows Dorothy around her childhood home but it was revealed in season 1 episode 24 that Big Daddy had sold the property to pay for a music tour and to escape the constant reminder of his late wife, the house was named Twin oaks.
Continuity mistake: When the girls are singing to the baby, the blankets keep disappearing and reappearing on the baby carriage.
Visible crew/equipment: At the very end of the scene at Sophia's new apartment, you can see a boom mic move above Dorothy's head.
Answer: Ice makers were a new invention, advertisement purposes.