After arriving on the world the group round a corner, Arturo says to check your flies, all the men do this but Quinn is supposed to be handcuffed still, as he is in the preceding and subsequent scenes.
In season one "The King is back" Rembrandt is on stage when the other Rembrandt joins him there, telling the audience that "our" Rembrandt is only an impersonator. Therefore Rembrandt leaves the stage and is welcomed by his friends backstage. The next shot is showing the stage from the front again and there you can still see "our" Rembrandt in the background, still on stage.
Jerry O'Connell "corpses" (cannot suppress his unintended laughter) when John Rhys Davis loudly berates the man who has mistaken him for Luciano Pavarotti.
When the Sliders escape from the courtroom, the order they entered the vortex was Wade first, followed by Quinn, Arturo, and Rembrandt last. But somehow, entering the next world, the order is out of sequence. Wade is still first on arrival, but somehow Arturo is second, Rembrandt is third, and Quinn is last.
When Wade, Arturo and Rembrandt exit the vortex in the courtroom, the trampoline they bounce off is visible in the bottom right corner of the frame.
When Arturo leaves Brim's office with the others to rescue Remmy from the kidnapper, he bumps into a metal lamp-stand and it makes a clanging sound.