Went to a Garden Potty - S4-E20
Continuity mistake: When Karen is talking with Norman about donating funds for his advert, and then when Jack enters, between shots during the scene Karen's pearl necklace keeps jumping in and out of her black shirt. (00:45:00)
He Shoots, They Snore - S4-E21
Continuity mistake: When Grace is setting up her design class, she writes "Professor" on the board, and curls the end of the R into a spiral. But in the shot when she says "T.A. - Teachers Assistant" the spiralled end on the R has gone. In the next shot it's back again. (01:04:40)
Continuity mistake: When Will and Gavin are at the gay club, they sit down at the table with their laptops. There is a bowl and a glass candle on the table, which change their position and even disappear in some shots. (00:14:00)
Hocus Focus - S4-E24
Continuity mistake: Before Fannie starts the photo shoot with Will and Grace, she unbuttons the top of Grace's trousers. But later on in the shoot you can see they're done up, then later on they're undone once again. (00:34:00)
Hocus Focus - S4-E24
Continuity mistake: After Fannie rips open Grace's shirt and ties the bottom into a knot, the way the knot is tied and positioned changes during subsequent shots. (00:34:00)
Hocus Focus - S4-E24
Continuity mistake: When Jack is stroking the rabbit that he thinks is Karen, the position of the mobile phone on the side next to him changes, and also a glass of drink appears next to him in one shot, but is gone in all others, previous and after. (00:41:05)
A Bunch of White Chicks Sittin' Around Talkin' - S4-E25
Continuity mistake: In the opening scene with Will, Grace, Jack and Karen, as they open the wine and talk about what they would like to accomplish in life, the newspaper disappears from the table during the scene, then reappears in a later shot. (00:47:30)
A Bunch of White Chicks Sittin' Around Talkin' - S4-E25
Continuity mistake: When we see Jack dancing at the open auditions, there is a grey sports bag behind him which alternates from propped up against the small black chair to sitting in front of the chair on the floor, many times during the scene. (00:52:25)
A Bunch of White Chicks Sittin' Around Talkin' - S4-E25
Continuity mistake: When Karen is talking to the security camera in the cell, before receiving the phone call from Stanley, the pieces of salami strewn all over the bed change and some pieces disappear, most noticeably one piece on the pillow. (00:57:30)
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)
A.I.: Artificial Insemination (2) - S4-E27
Continuity mistake: After Grace pushes Will, and he falls back and rolls over the bed, in the next shots the position and amount of rose petals on the bedspread changes, and the position of the pillows differs as well. (01:29:00)
Continuity mistake: In the episode "23" when Lorraine, Karen and Will are talking in the entrance to the church, before Stan's funeral, there is a signing book with a pen laying on it. But in one shot the pen has jumped back into the pen holder. It's back to laying on the book in the following shots.
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.
...And the Horse He Rode in On - S5-E1
Continuity mistake: When Grace and Leo are speaking at the table in the coffee shop, the muffin on the table keeps changing position, and Grace's hand keep jumping on and off of it between shots. The bites taken from it also differ.
...And the Horse He Rode in On - S5-E1
Continuity mistake: While in the coffee shop, Leo writes Grace a prescription. As she is reading the piece of paper, Leo puts the prescription pad back into his shirt pocket. In the next shot the pad is on the table in front of him.
...And the Horse He Rode in On - S5-E1
Continuity mistake: When Leo helps Grace after she runs into the lamppost, the camera alternates between two angles. Between these different angles, a park bench, beside Leo's white horse, disappears and reappears constantly.
...And the Horse He Rode in On - S5-E1
Continuity mistake: When Karen walks into her bedroom, she pulls her bed sheet up to discover Jack underneath. The bed sheet now hangs down over the end of the bed. between following shots the position of the bed sheet keeps changing.
...And the Horse He Rode in On - S5-E1
Continuity mistake: When Grace and Leo are speaking at the table in the coffee shop, the brown paper bag laying on the table in between them keeps changing position and also keeps alternating from being open to closed.
Bacon & Eggs - S5-E2
Continuity mistake: When Leo comes into Grace's design workplace, he starts to put pieces of cloth on his shoulder. Between shots, before Grace takes the pieces of cloth off of him, they change position on his shoulder completely.
Bacon & Eggs - S5-E2
Continuity mistake: When Jack and Will are outside behind the hedges, stalking Kevin Bacon, Jack hands the binoculars over to Will. Will holds the binoculars with one hand in one shot, but in the next shot he has both hands on them.
Answer: A history of the game can be found at http://www.fast-rewind.com/bacon.htm.
J I Cohen