Continuity mistake: In the scene where Danny is sliding the device to knock out the guards with uzis at the bottom of the elevator, the device slides on an angle to the line on the floor, but in the next shot it is sliding along the line. [On the DVD commentary, Soderbergh said that the filming crew had to slide the device many times, because it wouldn't slide far enough. There's the reason, but still a mistake.]
Continuity mistake: In the scene just after the group have discussed the plan in Reuben's house, it cuts to Frank listening to a conversation about crazy horse. When we see Frank noting information down on a crossword his left hand is writing and his right index finger is pointing out and the other fingers are folded like a fist, but in the following shot all his fingers on his right hand are stretched out.