Continuity mistake: In the opening scenes, Grace has red nail polish on. Later in the same scene, it has vanished as she shakes Mrs. McFarland's hand. (01:03:20 - 01:06:15)
Continuity mistake: When Karen pours a cup of coffee, the coffee is old, so she pours the coffee out of the window and puts the blue mug in a large see-thru plastic container. In the next shot the mug has vanished. (00:10:45)
Oh Dad, Poor Dad, He's Kept Me in the Closet and I'm So Sad - S2-E13
Continuity mistake: When Jack meets his father in the restaurant, his father says that he got a phone call from Karen Walker. When Jack says, "Wow," there is no sign of his arms being crossed, but when it cuts and Jack says, "I got the same phone call," his arms are suddenly crossed. (00:11:20)
My Best Friend's Tush - S2-E22
Continuity mistake: When Jack throws the butt-puppet at Will, and storms out of the room, one of the pantyhose legs unravels and hangs down. In the next shot it's shorter and wrapped back around. (00:13:30)
Visible crew/equipment: When Karen stands by the pillar she says "I want to talk to Ja...Wi...Rosario" and as she does, Jack and Will step forward. Anyway, you can see two white tape markers on the floor which they stop at. (01:13:50)
Acting Out - S2-E14
Continuity mistake: When Grace is talking to Karen on the phone, asking for advice on how to be mean, Karen is in the bath. The amount of bubbly foam on her arm differs in every shot. (00:11:40)
Tea and a Total Lack of Sympathy - S2-E10
Continuity mistake: After Jack and Grace burst through the paper screens at the 'Antiques on the Road' show, the hole made in the screen changes between shots. (00:34:30)
Whose Mom is It Anyway? - S2-E4
Continuity mistake: When Jack and Karen are waiting outside the INS office,Karen's leans against the back of the bench she is sitting on, and her arms are not crossed. When the shot changes, her arms are suddenly crossed. (00:12:15)
Whose Mom is It Anyway? - S2-E4
Continuity mistake: Near the beginning of the episode, Will is pouring some wine. First, he pours a full glass and hands it to Grace, then he begins to pour another glass that obviously already has wine in it. He then hands this to Grace and takes an empty glass from her to fill, which he already filled (there is no sign that she already drank the wine in the glass). (00:01:55)
To Serve and Disinfect - S2-E6
Continuity mistake: After Will and Grace finish eating the pizza on Will's desk, in his office, the positions of the napkins, pizza slices, pizza box and water bottles keeps changing throughout the scene. (00:42:35)
Continuity mistake: When Will and Grace sneak into Val's apartment to look for the music box, the number on the door is 12E. However, in Season 1, 'Grace Replaced', when Val and Will are talking in the elevator, she says she moved into 15F.
Continuity mistake: The position of the high heels in the barrel, in the church bazaar differ greatly between shots as Karen enters the room, up to when she walks over to find her slingbacks. No-one else touched the shoes in between. They also change position as Karen kindly gives Sally some extra money. (00:57:25)
To Serve and Disinfect - S2-E6
Continuity mistake: When Brian is asking Jack where his steak is, because Jack is waiting and doing a job as a pepperboy in the restaurant, between shots the large wooden pepper grinder which Jack is carrying, vanishes. (00:59:25)
To Serve and Disinfect - S2-E6
Continuity mistake: After Grace plays Karen's adult video, Karen drops her compact, and powder spills all out of it onto the table. In following shots the powder on the desk changes position and vanishes. In addition the compact case also moves too, and when Karen dropped it onto the table it snapped shut but in a following shot it is open again. (00:50:00)
Guess Who's Not Coming to Dinner - S2-E1
Revealing mistake: When Will is supposedly naked, reading his book, you can see he is wearing underwear when he slams the book down as Grace leaves. (00:08:30)
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)
Answer: A history of the game can be found at http://www.fast-rewind.com/bacon.htm.
J I Cohen