Revealing mistake: Near the end, right before Nita goes after Kenai, she takes off her dress. If you look closely, when she takes it off, her necklace and earrings come off with the dress as if they were a part of the dress. Also, her hair is tied back when she's wearing the dress. But when she takes it off, her hair is loose and flowing.
Plot hole: Kenai getting bonked on the head with a pinecone at the end could never happen. When Nita walks over to Kenai and Koda, we see that the only trees are to Nita's right. The pinecone then falls on Kenai's head from ABOVE. They look up and see a tree above them. Cut to a wide shot, there are no trees around them.