Continuity: Keaton supposedly cranks up a chainsaw. You hear it but it's not running.

Continuity: When the TV repairman shows up to find out what's wrong with the TV for the last time she says that she found out the problem with the TV: "this shoe." It was a shoe that was left in the TV after Michael Keaton kicked the screen in. However, watch the scene, his shoe never leaves his foot.

Continuity: When Jack kicks the TV it falls backwards, and the screen has snow on it. However, when the repair technician comes in, the screen is broken.

Continuity: When Carolyn leaves the house for her first day of work the sun is out, then it begins thundering and raining. It's pouring while Jack takes the kids to school. When Carolyn gets to work, the camera shows a far back shot of her new office building and the streets and all are clearly dry - she could work in a different part of town, but then when she gets in the elevator, which is made of glass and on the outside of the building, it's soaking wet from the rain.

Factual error: Jack lives in suburban Detroit, yet there are palm trees along the streets.

Continuity: Just after the baby, Megan, eats the can of chili, she hiccups once or twice. You can hear the hiccup, but her stomach and mouth don't even move with the hiccup.

Revealing: After the baby eats the chili, Jack comes out of her room holding a clean diaper with tongs and puts it in the garbage bag. It should have been a dirty one.

Continuity: In the scene where Megan eats the can of chili, first it is all around her mouth. The camera moves to Jack and the others, then back to Megan. This time the chili is all around her entire fac, not just her mouth. a few shots later, the chili mess moves again.

Continuity: In the scene where Kenny lies on his bed after his dad takes his blanket away, his feet are toward one side of the bed, but when the camera angles changes, he is lying in the middle.

Continuity: When Martin Mull and Teri Garr fly to the West coast on the company's private jet they have a bottle of champagne. There are three shots: both of them, him, and her. During the cutting between shots the ice in the champagne holder keeps disappearing and re-appearing throughout the scene.

Deliberate "mistake": On Carolyn's first day, the scene is set by showing the exterior of a large square office building supposedly in Detroit, but when she is riding up the exterior elevator, it is obvious that the building outside is the Bonaventure in Los Angeles.

Visible crew/equipment: When Caroline arrives home in the taxi cab at the end, she sees Joan's red car in the driveway. When she opens the door you can see a reflector screen in the window for a split second. (Use slo-mo if necessary).

Continuity: When Caroline walks in and Joan is on her bed, Joan raises straight up, in the next shot she raises straight up again.