Other mistake: Jackie comes out of her room while Fez has Caroline over, stating that she has to use the bathroom. However, in a previous episode, during Fez and Kelso's fight for the same room, it is the room that "has its own bathroom." (00:16:00)
Continuity mistake: When Fez knocks the clown over and shatters it, you see the head roll in front of the body and out of frame with the nose still attached. Donna then turns around and runs in to take the nose from behind the body of the clown.
Other mistake: When Bob comes to order from the clown, he gets told to go away since they're closed. He starts pulling away, but you can see he doesn't leave the frame quickly. The edge of the car is still visible when the gang is sneaking back over.
Good Old Fashioned Lover Boy - S8-E11
Continuity mistake: While St. Christine and Jackie speak about honesty, the brownies in Jackie's hand suddenly switch to Christine's hands in one shot, then return. (00:20:05)
Character mistake: Right after Hyde comes into the kitchen to get whipped cream for the stripper wife, Kitty Forman says "Kurt" instead of Red to Kurtwood Smith.
Suggested correction: She says, "Okay, what were you two talking about?". She doesn't use any name at all.
Factual error: When Donna and Randy are in Eric's bedroom, Randy is playing with Eric's toy lightsaber. However, the blade is green. No green lightsaber toys were produced until after the release of "Return of the Jedi", which occurred in 1983. Moreover, the handle is the modern style, not the vintage.
Continuity mistake: When Hyde enters the scene, his shirt is somewhat tucked behind his belt. In the following close-up shot his shirt is above the belt but returns to the tucked position in the next shot. (00:00:10)
Factual error: Fez wears a Sergio Valente pullover, which is a company not founded until 1981. (00:02:20)