Continuity mistake: At the end of the ep., where Will and Grace play a board game, the red plastic cards on the board change their position many times, as does the paper money and the dice. (00:18:45)
The Big Vent - S1-E9
Continuity mistake: When Grace is listening through the vent, she is leaning on a cushion. Between shots the cushion rotates because the stripes on it change from running horizontical to vertical. (00:43:45)
The Big Vent - S1-E9
Continuity mistake: After giving Will and Grace his scripts to read, Jack places his drinks bottle on the table and walks over to the door. When he reaches the door he suddenly has the drinks bottle in his hand, although he left it on the table across the room. (00:47:00)
The Truth About Will & Dogs - S1-E10
Continuity mistake: Grace asks Will to watch the dog quickly as she goes to the bathroom. As she puts the dog on the sofa, the position of the wine bottle, wine glasses and cork on the coffee table change between shots. (00:26:40)
The Truth About Will & Dogs - S1-E10
Continuity mistake: When Karen spills her martini on the floor, she places the beige skirt she was holding down on the pile of clothes she was sorting out. In the next shot the clothes pile is arranged differently. (00:36:40)
The Truth About Will & Dogs - S1-E10
Continuity mistake: When Karen was at Will and Grace's flat with Jack babysitting the puppy. She puts her cocktail glass down on the table and leaves, but when Will and Grace come back from the movie there is no glass on the table. (00:36:50)
Will on Ice - S1-E11
Continuity mistake: When Will and Grace stand in the kitchen discussing the grey hair, the back of cereal packet (on the counter) faces the camera, but for one shot the front of the packet is showing. (00:00:35)
Will on Ice - S1-E11
Continuity mistake: As Will collects the paper from outside the door, We see Grace sitting at the table, a pad and pen on the table in front of her. In the next shot the pen has vanished, and a newspaper has appeared next to the pad. (00:01:30)
Will on Ice - S1-E11
Continuity mistake: When Will and Grace play the "love her, hate him" game, they open a magazine up. In the next shot you can tell it's on a different page, because the layouts have changed. (00:05:45)
Will on Ice - S1-E11
Continuity mistake: When Karen arrives at work, she places her bags on the chair, and then puts them down onto the floor. In a following shot they are back on the chair, then in another shot they're gone again. (00:07:55)
Will on Ice - S1-E11
Continuity mistake: When the gang are at Champions on Ice, Karen gets out a bottle of champagne and a glass a starts pouring herself a drink. As the shots change, the bottle and glass keep swapping hands, even as she is still pouring. (00:13:45)
Continuity mistake: At the beginning of the episode Will takes two bottles of water from the fridge. He unscrews the lid off them both and picks them both up. In the next shot he picks the second one up again. (01:03:20)
Continuity mistake: When April enters the room, she puts her grey jacket and red bag on the couch. When Will leaves the room, the jacket and bag have disappeared. (01:05:55)
Continuity mistake: When Will and Grace sit on the rocks in the meditation room, at the end of the episode, the position of Grace's coat changes between each shot. (01:22:00)
Continuity mistake: When Will introduces Grace to April, the pencils in Grace's hair changes between shots.
The Unsinkable Mommy Adler - S1-E13
Continuity mistake: In the restaurant scene, after Will grabs a breadstick and Grace snatches it from him, the position of the breadsticks in the bowl, in the centre of the table, constantly change through the whole scene. (00:33:50)
The Unsinkable Mommy Adler - S1-E13
Continuity mistake: When Grace is reading through her diaries, through all following shots in the scene the position / location of the yellow, furry diary on the floor keeps changing. (00:37:40)
Big Brother is Coming (1) - S1-E14
Continuity mistake: When Will is throwing ties from the closet, we see that they all land on the floor. The angle changes, and one has now appeared on the bed. (00:08:50)
Big Brother is Coming (1) - S1-E14
Continuity mistake: When Will tosses all the ties out of his cupboard, the tie which landed on the end of his bed keeps changing. In some shots it's a blue and black stripy tie, in others it's a yellow and brown stripy tie. (00:08:50)
Big Brother is Coming (2) - S1-E15
Continuity mistake: Several parts of the mess in Will's apartment keep switching places. Look at the glasses and napkins. (00:20:45)
Answer: A history of the game can be found at http://www.fast-rewind.com/bacon.htm.
J I Cohen