When Hildegard tells Sofia that King Roland became her dad when her mom married him, the flowers on the left side of her head were missing.
Sofia's hair is bouncy when she's wearing her fencing outfit.
There have been some shots in this episode where Sofia's amulet is missing.
Look closely: When Garrick was putting on Hugo's ice skates, not only can Hugo's hockey helmet be seen on one of the pine trees, but Hugo looked like he was wearing the strap from his helmet!
Ice hockey practice and ice-dancing class are supposed to meet at the same time, but when Hugo was switching back and forth, Sofia was the only one on the pond, and he didn't seem to notice.
When Garrick showed up at his ice rink to see Sofia and Hugo, he was carrying ice fishing gear. But when he left the children alone, he didn't take his gear with him.
Flora had her wand in her hand when she flew up to Hugo and Garrick. But when Garrick asked Flora if she needed an assistant ice-dancing coach, the wand disappeared. Then when Sofia asked if the whole hockey team could try ice-dancing, Flora's wand reappeared again.
Flora gave Prince Hugo a pair of enchanted ice skates to help him ice-dance. However, instead of giving the other boys enchanted ice-skates, she just put a magic spell on their hockey skates.
Strangely, Hugo was able to perform a perfect axle in his hockey skates, which would be impossible since hockey skates aren't designed for ice-dancing.
Maya was between Amber and Clio when Sofia said that Hugo couldn't come to the ice-dancing recital. But then Maya mysteriously disappeared when Flora said that it was a shame Hugo couldn't join the princesses.
Sofia had trouble learning how to ice-dance until Hugo helped her out, but for some strange reason, she was able to skate perfectly with him during the song Take a Leap.
Sofia's leggings were originally dark purple, but when she tried to do the Stargazer Spin the first time, her leggings were pale blue. Then for the rest of the episode, the leggings were dark purple again.
When the hockey team caught Hugo ice-dancing, his hands were bare. But when Hugo said "I like hockey; I just like ice-dancing more. Go ahead; make fun of me", he was wearing his white mittens. When James said it was great that Hugo is ice-dancing, Hugo's mittens disappeared.
James said that girls can play hockey if they want to, but Sofia never said anything about being interested in hockey.
King Garrick was able to fit into Hugo's black skates despite his son obviously having much smaller feet.
This isn't the first time Kari isn't #1 at something. In Sidekick Clio, she didn't get the lead in the school play Hello Polly.
Sofia's mouth doesn't move when she says, "Cave moss?".
When Sofia rode the crystal boat, she sees historical displays based on the Disney Princess.
Princess Hildegard's older sister makes a cameo appearance in the beginning, and she looks exactly the same as she did in the flashback in The Princess Stays in the Picture.
The sleeves to Kari's parrot costume are originally blue, but when she and Clio sang, "On these wings of a dream, at last I'm here", Kari's sleeves were white.