Continuity mistake: In episode 10 (Joey's Place) the Tanner family move Joey into the garage, redecorating it so the entire place is filled with Joey's furniture, but in this episode it shows the characters in and out of the garage which is completely empty and back the way it was before Joey moved in. Later in the episode Joey's stuff is out of the alcove again.
Other mistake: In the first episode it shows the house a mess and Danny and Joey and Jesse not wanting to clean. Then in the future the show portrays Danny as always being a neat freak, even as a child.
Continuity mistake: In the first episode, in DJ's room when Stephanie is crawling across the curtain rod, you'll notice that there is a giant window, and a window behind Stephanie's bed. In later episodes, the giant window turns into a 3-paned bay window, and the window behind Stephanie's bed disappears.
Continuity mistake: In "One Last Kiss", Jesse goes to his high school reunion and then in the flashback, he rides his motorcycle into the gym and says to his girlfriend, 'I'm graduating tomorrow, what are they gonna do, expel me?' indicating that he graduated. But in this episode, Jesse says he's a high school drop-out and he needs to take an English class.
Visible crew/equipment: In the beginning of the episode, Joey is preparing the game with Michelle and the team. When Joey asks if anyone has any questions, Aaron says he does and asks Joey if after the game he was going to buy them pizza or if he was too cheap. Right when the shot changes to Joey, you can see for a brief second at the top left hand corner that the mic is visible and a camera on the bottom left.
Continuity mistake: When Jesse, Joey and Danny start telling Stephanie and DJ the story while they are laying in DJ's bed, Stephanie has 2 barrettes in her hair. Watch closely and then there's only one barrette in her hair, and then when Danny puts her to bed, there are 2 again.
Plot hole: When Jesse and Michelle wake up in the morning, you can see that the picture Danny got was behind the couch, resting on the seat in the alcove. Later, when Danny goes into the living room and screams, Shorty is standing in the middle of the room, with his head in the picture, and the picture is facing the family. There is no way that the donkey could have put his head in that way.