Continuity mistake: During the closing credits, Niles brings a breakfast tray into his dining room and puts it down in front of Marta, who is reading a newspaper. When she puts the paper down, there is a rose lying on the tray - in the previous shot there had been no rose, but there had been several pill bottles there which have mysteriously disappeared.
Continuity mistake: In this scene, Martin and Daphne are arguing about Martin buying the gift basket for Daphne because Daphne knitted the sweater for Martin. Daphne says the basket cost too much, so Martin begins to take items from the basket and put them on the table. Then as the argument progresses Martin and Daphne decide to take back their gifts. Martin places the gift basket on his chair (the two items that were taken from the basket are still on the table) and Daphne takes the sweater. A minute later they make up and agree to re-exchange the gifts. Daphne gives Martin his sweater and when Martin reaches for the basket, all items are there, including the ones that were still sitting on the table when he put the basket on the chair.