The women are all standing in front of Edie's burning house. As Bree turns to her husband, Rex, it is actually the actor who played Rex in the unaired pilot (Michael Rielly Burke) and not the actor who replaced him (Steven Culp).
At the funeral reception at Paul Young's house, Lynette enters and exits the pool wearing high-heeled shoes. She walks towards Paul, still wearing shoes. In the very next shot, just as she's walking up to Paul to extend her apologies and say good-bye, the camera shows her barefoot. There's no way she had time to take her shoes off.
When Lynette is shopping in the supermarket, right after she loses track of the twins, she is shown pushing the shopping cart down the aisle and in the seat there's only a pink blanket; however in the next shot, her daughter is sitting in the seat with the blanket and one of her sons is riding in the basket.
When they first introduce Mike's house it has a wood door with three little windows, in the next episode it is a white glass door, with a curtain inside.
At the funeral reception at Paul Young's house, Lynette enters the pool to get her children out and only the tips of her hair get wet. In the very next shot, as she's talking to Paul, her hair is dripping wet.
Seen when Tom gets home from his work trip and Lynette is feeding Penny, the first story of their house is completely different from their house in rest of the series.
When Susan sits on Edie's couch, just after she threw the bra behind her which knocks the candles over, a crew member in blue jeans can briefly be seen moving on the floor behind the couch to the right.
When Bree waters the flowers in the bathroom of the hospital, there is the shadow of the camera man visible behind her.