When Doug and Ray debate about whether to golf in the rain, Doug stands up from a swivel chair. It rotates, stopping with the back facing the table. It switches to the front facing the table between shots without being turned.
Doug is in the backyard, trying to convince Richie to come back at 4 so they can watch the Mets game. Richie zips up his jacket during this conversation but then it's unzipped moments later...still during the conversation.
Arthur takes a handful of broken rubber bands out of the garbage and starts to head to the basement. In one scene he has the rubber bands in his left hand. Right before he goes downstairs there are no rubber bands in his left hand.
When Ray Barone picks a card from the deck we can see that he is holding a Queen of Hearts, yet when he "accidentally" drops the card he says to Arthur that it was a Queen of Diamonds.
When Doug and Ray are golfing in the rain, Ray attempts to hit the green with an 8-iron off the tee. However, the sign behind them clearly shows that the hole is a par-4 and 325 yards long from even the shortest tee box, an impossible shot with an 8-iron.