When Jack is sitting at the dinner table after Bill has left the house, Jack's hair changes noticeably between shots - from fuller to more slicked down and back.
When Bill and Lily are embracing in the kitchen in front of the stove the moving shadow of the boom microphone is visible on the wall below the window behind them.
Towards the end of the film a low angle shot shows a train going by in a heavy rainstorm. A water pipe is clearly visible in the background spewing out the simulated rainwater.