Continuity mistake: The crane that is behind the tree has a rope attached to it, but when Isabella comes the rope disappears.
Continuity mistake: Candace mentions that Jeremy works at Mr. Slushy Burger, but in later episodes is shown at Mr. Slushy Dawg. Afterwards, it was changed back to Mr. Slushy Burger.
Continuity mistake: When the "arms" take Perry's hands and feet. The "arms" came from the front of Perry, but in the next shot they've come from behind him.
Flop Starz - S1-E3
Continuity mistake: During the flashback to when Linda was Lindana, a mark can be seen on her right cheek but in the shot of her in the elevator and the newspaper saying she's back, no mark is visible. Also, her hair bow is on the wrong side.
Candace Loses Her Head - S1-E7
Continuity mistake: At the starting of the episode when Phineas wakes up you can see right next to him there are two pillows on his bed but when he sees the calendar and is about to throw the pillow on Ferb you can see that there is only one pillow.
Continuity mistake: Candace's neck is being measured in length for the fashion show, and an assistant is using measuring tape very close to her. In the next shot, he has completely vanished.
Continuity mistake: When Phineas, Ferb, and Candace go to the stairs, the door has 'stairwell' written on it. Then, when the bubblegum case falls, before it goes through the door, it reads 'stairs', but once the door is open, it's back to 'stairwell' again.
Continuity mistake: In the scene where Doofensmirtz talks about how the sign blocks his view of other people's pain and misery, his window faces the sign. Then in the next shot where the laser blasts the sign, the Doofensmirtz evil inc. logo is facing the brick sign and the windows are facing the other way.
Continuity mistake: During the "Busted" song, the machine Dr. Doofinshmirtz is building is dark-grey and green. However, later in the episode the same machine is light-grey and blue.
Continuity mistake: When Perry is in the cage up in the air, the cage is being held up by a really thick metal wire, but when Charlene Doofinshmirtz (Vanessa's mom) lets Perry out of the cage the wire looks like dental floss.
Continuity mistake: When Dr Doofenshmirtz falls into the toy factory he goes crazy because he sees so many Perrys. Look at the Perry toy beside him first - the toy's foot points up, but in the next shot its foot is on the ground.
Continuity mistake: After the "Har D Har" commercial, the man puts the remote on the table, but in the next shot it's gone.
Dude, We're Gettin' the Band Back Together! (Part 1 & 2) - S1-E22
Continuity mistake: During the song at the end, there is a zoomed out shot of the entire crowd. You can see Phineas and Candace both screaming with their hands in the air, their eyes closed, and Phineas is not holding a camera. When the camera instantly cuts to a close up of them, both of them have their mouths closed, their hands down, their eyes open, and Phineas is holding a camera.
Dude, We're Gettin' the Band Back Together! (Part 1 & 2) - S1-E22
Continuity mistake: When Perry is tied to the firecracker he uses a laser watch to burn himself free, but in the next shot it's gone.
Dude, We're Gettin' the Band Back Together! (Part 1 & 2) - S1-E22
Continuity mistake: Near the end of the "Love Handel" concert the people in the audience switch from being close together to spread out leaving a path between shots.
Dude, We're Gettin' the Band Back Together! (Part 1 & 2) - S1-E22
Continuity mistake: During the song "Ain't Got Rhythm" Swampy's earring switches ears between shots.
Dude, We're Gettin' the Band Back Together! (Part 1 & 2) - S1-E22
Continuity mistake: During the end of the episode, Phineas is video taping his parents, but what he is recording is a different angle that what is being shown on the screen. From Phineas' angle, the camera is only showing the back of his mom's head. However, the big screen above the band shows that the camera angle can see both of his parents' faces.
Dude, We're Gettin' the Band Back Together! (Part 1 & 2) - S1-E22
Continuity mistake: You can see Candace hugging Phineas. But in the shot directly after that, they're no longer hugging.
The Ballad of Badbeard - S1-E24
Continuity mistake: When Candice gets dragged by Perry in the lake, she flips and lands vertically, but when it zooms out she is being dragged flat.
Got Game?/Comet Kermilian - S1-E30
Continuity mistake: Candace is wearing a white crop-top and dark blue jeans in this episode, but when she goes to get ice-cream and because of Suzy falls into the cart, the cart begins moving and crashes into the tree. When Candace raises her head and upper torso out of the cart for a brief moment, she is wearing her usual red dress. But in the next shot, however, she is wearing her white crop-top and dark jeans again.
Answer: And Bart Simpson should be about 40 by now. Cartoon characters don't age in real time. And are you really counting summer vacation days in a show about children who build spaceships and a platypus who's a secret agent?
Brian Katcher