Revealing mistake: Ryan is seen on the left side of the screen breaking character by laughing and smiling, before seeing the camera and stopping. (00:18:05)
Factual error: While the sales team break up the huddle in the parking lot to do sales calls, the camera zooms out and you see a palm tree in the background, but this show takes place in cold weather Pennsylvania. (00:16:25)
Other mistake: When Michael is playing with "Harvey" the computer, it says whatever he types. When we briefly see the computer screen, the entire dialog for the scene is already typed out, in spite of it including text that hasn't been said yet and that Michael wouldn't know Harvey would say (such as "you ruined a funny joke, get out of my office").
Continuity mistake: When the dancer is sitting on Michael's lap, she messes up some of his hair, causing it to stick up. In the next shot, his hair has fixed itself.
Continuity mistake: The dancer is eating some M&M's on Pam's desk. In one shot, there are some M&M's on the table in front of Pam. In the next, they are missing.
Continuity mistake: When Angela is listening to Ben Franklin talk about flying his kite, her drink is near her lap, but in the next shot she's taking a sip from it.
Continuity mistake: Michael and Dwight arrive at Wallace's house and discover that Michael is dressed like the servants, so they choose to exchange shirts. Behind the catering van, Michael removes his jacket and throws it on Dwight's shoulder, who grabs it and puts it between his legs. The frame switches from front to side, showing Michael removing his tie and hanging it on the van's mirror. When the frame goes back to front, Michael is shown still with his tie on, and throwing the jacket again, missing Dwight. (00:05:41)
Answer: In the 2007 episode "Ben Franklin" when Jim is talking to Pam there is a candy bar with a purple wrapper that says "Picar-" I assume picaroon, it's hard to see past Pam. I found this trying to investigate what that candy bar is lol.