Fixed S1E19
In the iTunes release of the episode, Rainbow Dash and Fluttershy are missing when the group arrives at the bottom of the hole. Another iTunes exclusive error, albeit minor, is the consistency of the appearance of Twilight Sparkle's rope harness: For example, in one scene, when Twilight Sparkle bucked off the Diamond Dog guard riding her, the guard haphazardly pulled off the harness with his claws as he was flung away. In other releases of the episode, Twilight Sparkle's harness remained around her head rather than being pulled off. The show's director, Jayson Thiessen, explained that iTunes somehow got an older version of the episode that was not meant for air. (Original text : http://mlp.wikia.com/wiki/A_Dog_and_Pony_Show )
ZR Fixed those problem.