In the syndicated version of "The Patchwork Bear", part of the scene where the Smurfs meet the Emerald Empress is cut, in which Smurfette and the Empress compliment each other, only to be interrupted by a very distressed Brainy.
In "The Patchwork Bear", when Patchwork tells the story of how the kingdom became frozen, he says the former Emerald Emperor went to "the big crystal palace in the sky". This means that the Emerald Emperor passed away.
In "Hefty and the Wheelsmurfer" the first song played in the wheelsmurfer's horn when Handy was giving a demonstration to how it works, was the song "London Bridge Is Falling Down".
In "Hefty and the Wheelsmurfer" Baby Smurf briefly stood up while he tried to imitate Hefty.
In "Hefty and the Wheelsmurfer" the song Gargamel plays on his flute to summon the boa was also the Smurf song, meaning the song was heard right before Baby played it on the wheelsmurfer's horn.