My friend noticed this one...when the Huntsman is chasing the gang in the country after they left on the wagon to go find the mirror (before they get to Kissing Town), the camera is following the Huntsman and in the distance you can see power lines about the trees and houses. Power lines would not have been around at the time that this movie is set.
own2sphynx -- the movie does take place in the same time period but in a parallel-like place. but remember, the trolls had never seen man-made lights before. they thought the city was lit up with candles. so whos to say that no one else in the 10th kingdom has ever experienced electricity? plus, there are no radios, microwaves, etc. (anything electric) throught the movie, so what would be the purpose of the power lines?? i say its a slip up...at least a small one with editing.