When Roger drops Stan off at Big Buy, Stan trips over a parking bumper. When Roger decides to abandon Stan for not buying his television, he pulls forward without running over the bumper which has vanished from the accident scene.
Linda's shirt changes with a lone button to a deep v-neck with a collar to a regular tank top.
Roger's attic window is missing in an exterior shot.
There is a shopping list on the refrigerator, but moments later when we see Stan and the monkey sitting together, there is no list.
The paper samples on Roger's books change from 2 to 1.