Other mistake: When Viper slides the swords to Jackie and they come to a rest next to him, there is a small paper spider right beside Jackie. The only paper spider in the room, however, is Origami himself, and he is actually too far away at that moment and too big to fit the bill. Guess some of the animators got their depth perception messed up.
Strategy X - S1-E1
Other mistake: When Nightcrawler pumps his fist in elation while standing in front of the mirror, his arm casts no reflection. (00:09:52)
Episode #1.2 - S1-E2
Other mistake: The very first word of the opening title contains an embarrassing typo, considering it's the name of the main character: It reads "Maud'Dib", instead of "Muad'Dib".
Other mistake: After they arrive in Marina Bay the pink ranger is wearing the red ranger's jacket.