Other mistake: At the beginning, when Pod is climbing up the table, he does it in seconds. There's no way he could have gotten up that fast.
Other mistake: When Arrietty and Pea-Green slide along the power line, they go pretty far. They would have hit a post and gotten electrocuted.
Other mistake: When exterminator Jeff pulls off the foam from Potter's face, it removes his mustache from his face. In reality, it should've removed both his mustache and eyebrows, which remain on his face after he is burned by the foam.
