Continuity mistake: When Ellen Brandt is confronting the Police Chief of Rose Hill, TN at the bar. The weapon that is visible that Brandt takes is a semi-automatic with a single stack magazine. The weapon which she shoots has a double stack magazine. (00:54:10)
Continuity mistake: In the scene where Thor tells Jane to hold on, she's on Thor's right side and Mjölnir (the hammer) is in his left hand. As they are traveling through the Bifröst to Asgard, the position of each has changed. (00:28:20)