When Isabella is holding Bruce, Nina and Lloyd at gunpoint, Lloyd's arms are sometimes up and sometimes down.
In the last scenes where before Bruce and Lloyd go in the elevator, there are three people inside, Bruce, Lloyd, and you can see someone's shoulder, but when the doors open, the third guy disappears and only Bruce and Lloyd come out.
When Bruce and Lloyd are programming movements into "Hymie", Bruce slaps items onto Neil's head. Then we zoom out and Bruce is at the computer with Lloyd.
In the scene where Isabella describes how her father was kidnapped, we see Isabella as a young girl. The little girl has brown eyes, however the grown up Isabella has green eyes.