Plot hole: The whole Series 7, episode 5 "Key Party" revolves around Will's 37th birthday. Yet in Series 8, Episode 2 ("I Second That Emotion") Will is talking with Karen at the bar and says "I'm unemployed, I'm single and I'm 41", and four years certainly didn't pass.
Continuity mistake: When Karen is talking to Will at the bar, she is trying to "break down his wall" and starts talking about his relationships. In one shot an extra drink appears on the bar (whisky?), sitting on a red napkin and in the next shot it's disappeared. (00:14:45)
Continuity mistake: When Jack is stuck for a special guest on his show Jack-Talk, he surprisingly introduces Grace to be his guest. As she turns around on the sofa and sits down, there is a yellow and brown cushion on the sofa sitting to her right. But in the next close shot of her, it is under her arms as she leans on it. In the next shot the cushion is to her right, sitting on the sofa again. Then as the scene continues, the position of all the cushions on the sofa surrounding Grace keeps on changing! (00:07:20)
From Queer To Eternity - S7-E22
Continuity mistake: When Karen and Jack are talking at the little table outside Jack's apartment, there is a little menu card (sitting inside a holder) on the table which moves itself as the scene continues. (00:11:50)
The Blonde Leading The Blind - S7-E20
Continuity mistake: When Will is talking with therapist Dr. Georgia Keller, when she walks away from the window she sits down and crosses her legs. Then as the scene continues her crossed leg keeps changing from being her right or her left leg. (00:03:40)
It's A Dad, Dad, Dad, Dad World - S7-E21
Continuity mistake: When Grace is talking to her Dad in the front room after first seeing him, she stands in front of a table with one of her bags sitting on it (behind her). During the scene the bag keeps changing location on the table without anyone moving it. Additionally the bags on the floor under the table move themselves around as well. (00:04:45)
Will & Grace & Vince & Nadine - S7-E7
Continuity mistake: When Jack retrieves the dinner plate of food from the oven, when he brings it back to the table and sits next to Will, he puts the plate down and it have a foil covering on it. But in the next shot he begins to eat from the plate, with the foil instantly off (sitting on the table) and Jack having not removed it. (00:12:10)
The Old Man And The Sea - S8-E3
Continuity mistake: Near the start when Will, Grace and Jack are talking about the new swimming pool, Will starts to peel an orange. In the first shot he peels some of the skin off and drops it on the table. In the next shot there is no peel on the table and he is still peeling it. As the scene goes on, the pile of orange peel on the table that he leaves, keeps changing position. (00:01:30)
Revealing mistake: When Grace and Will are looking at the large tin of Protein shake powder, you can see there is tape covering all of the logos and brand name on the tin. (00:21:45)
Answer: A history of the game can be found at http://www.fast-rewind.com/bacon.htm.
J I Cohen