Revealing mistake: In the opening credits, Beefy Bert has a different hair colour to what he has in the actual episodes. This was not included in Series 3.
Continuity mistake: The broken glass on Nathan's face and arms disappears when he is pouring out the rice, but reappears when he is yelling into the PA system.
Continuity mistake: After Vinnie talks about his "responsibility to have fun", he swallows his Squid Shake, while Rocket didn't swallow his (his cup can be seen in the shot). When baby Professor Q cries, both Vinnie and Rocket throw up, even though Rocket didn't swallow his drink. (00:04:50)
Hear Today, Gone Tomorrow/Double Whammy/Autopsy Turvy - S1-E13
Continuity mistake: Autopsy Turvy: In the music store, Evil Flippy shoots five flutes at Flippy with a harp. Flippy blocks them with a cymbal, and then there are suddenly a lot more than five flutes flying around the store. (00:18:27)