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)
Continuity mistake: When Will and Grace fight over the birthday cake which Larry holds, it results in the cake being dropped. Note the position of the cake after it is dropped to the floor. In a later shot during their conversation, it has changed.
Someone Old, Someplace New (1) - S4-E17
Continuity mistake: When Jack is making his film for Karen, as he's interviewing Grace, he holds a cheque book up to his mouth. Between shots the book randomly alternates from being in his right/left hand. (01:31:40)
My Best Friend's Tush - S2-E22
Continuity mistake: When Jack is talking to the board manager about kicking Will out of the 'Subway Tush' invention, confetti on Jack's shirt front disappears then reappears, and the confetti on his shoulders differs as well. (00:10:40)
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)
Gypsies, Tramps and Weed - S3-E7
Continuity mistake: Some of the people move around and change psoitions between shots in the background, when Lenny has people dealing drugs in Grace's office.
Dames At Sea - S6-E1
Continuity mistake: When Grace puts her arm around Leo's shoulder after finding out that he has photos of her, the position and angle of the silver bands around her wrist changes. (00:13:20)
The Kid Stays Out of the Picture - S5-E3
Continuity mistake: Grace walks into her office to see that she has a vase of red roses from Leo. During her conversation with Karen about Leo, and during their kiss, the position of the roses sticking out at the top of the bunch changes.
Boo! Humbug - S1-E5
Continuity mistake: When the father comes to pick up his children, the plastic pumpkin goody-bag moves from the edge to the centre of the rug between shots. (01:01:00)
Continuity mistake: When Grace and Leo accidentally meet each other in their apartment, ruining Will's surprise, they have a cuddle, then Leo walks over to the fridge. Between shots the back of his collar changes from folded down to folded up.
Continuity mistake: When Rosario walks in on Karen and Beverly fighting on the table, the hairpiece Beverly holds swaps hands between shots. (00:36:15)
Lows in the Mid-Eighties (2) - S3-E9
Continuity mistake: When Will tells Grace that he is gay, there is a tray of finger foods on the table next to him, as he kneels on the floor. In the second shot, the plate is covered in cling film, but in shots before and after, there was no cling film.
A.I.: Artificial Insemination (1) - S4-E26
Continuity mistake: When the four are eating dinner and talking, Will says "Well I don't wanna sleep with you either," and in this closeup Karen picks up her glass of wine. In the next shot the wine glass is back on the table and she's now holding her fork. (01:14:35)
Loose Lips Sink Relationships - S4-E5
Continuity mistake: When Jack tells Karen to look away from the hand cream guy, a pair of trousers appears in her hands between shots. In following shots as well, the height of trousers piled on the table increases. (00:04:30)
The Third Wheel Gets the Grace - S4-E1
Continuity mistake: The stack of shoe boxes beside Rosario changes from when she begins to explain that she's been stalling Karen to spend time with her, to when Karen gives Rosie her credit card and makes a mad dash. (00:15:25)
Continuity mistake: When Grace is in the batting cages, she gives Will some money to go buy her a corn dog and some nachos. The door to the cage is wide open, but in the very next shot of Will, the door is locked shut. (01:17:50)
Whose Mom is It Anyway? - S2-E4
Continuity mistake: When Will and his date are having dinner at Will's flat, will pours his date a glass of wine into an empty glass that the date is holding out. When the shot changes the date is holding a full glass near his chest, and when the shot changes again, Will is still filling it up.
Continuity mistake: In the episode "24" when Rosario brings the huge popcorn can in, which has Stan's ashes in it for them to scatter, she puts it down in front of the table, at about the center of it. In following shots the location of the can has changed, moving more to the left / right, etc.
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)
Strangers with Candice - S6-E9
Continuity mistake: When Will and Stephanie sit down to join Alex and Grace to order some dinner, the purse sitting on the table between Will and Stephanie - it's straps change from up/down between shots. (00:15:30)
Answer: A history of the game can be found at http://www.fast-rewind.com/bacon.htm.
J I Cohen