Continuity mistake: When Grace enters Will's office, while he is spinning around on his new office chair, she goes and puts her black purse down on the desk. In the next shot it is positioned differently. (00:04:30)
Continuity mistake: When Will enters the backstage washroom to tell Jack that he can make fun of him on stage, Jack puts the blue flannel in the sink, so that we can't see it. In the next shot the flannel is hanging out, over the sink's edge. (00:17:35)
Continuity mistake: Will squirts Jack with his bottle of water, the water level obviously drops quite a bit, in the bottle. But in the next shots, the bottle is filled right up to the top once again. (00:10:00)
Continuity mistake: After Will squirts his bottle of water all over Jack, the amount of water on his shirt and face differs through following shots. (00:10:00)
Continuity mistake: When Will is talking to Jack and is folding tea towels, he folds the same tea towel twice between shots. (00:01:30)