When Snipes signs his hand print on the letter, he places his right hand down, to reveal a left hand print.
In his picture in the book, The Duke is wearing his monocle on his left eye, but when he shows up in Edmund's room, he is wearing it on his right.
The Grand Duke and the rest of his clan hate the sun and any particular light source, yet he bakes a pie near a bright, crackling fire.
When Goldie says "Oh, no. What have I done?", her lips are not moving at all.
It's established that Chanticleer's crowing causes the sun to rise every day. But, early on in the movie, the sun rises without Chanticleer's crowing. And after he leaves shamed, it stays dark and begins to rain eternally. Later the sun rises again after Chanticleer returns to crow, with no explanation as to why the plot seemingly contradicts itself.
When the gang is chanting Chanticleer's name to empower him,Goldie's outfit is red as opposed to black/purple.