Other mistake: When Ethan shoots gas at the black SUV where the Italian accountant is, the two bodyguards faint instantly, Ethan wears a mask to avoid that, but the accountant never faints, and keeps awake and screaming all the time.
Other mistake: All the power is down but the fans in the bakery are still working.
Other mistake: Spoiler... When Stu Cobbler (Martin Starr) is revealed as the murderer, he goes to Gia's apartment to kill Veronica. Upon entering, Cobb has to disable an alarm with a digital touch pad, requiring the use of his fingers. However, he uses the metal barrel of the gun.
Suggested correction: Touchscreens don't need human skin to work. Capacitive touch screens just need something conductive (that's how touchscreen styluses work), and metal is conductive (albeit likely scratching the screen). But you also get resistive touchscreens, which simply detect pressure, and anything works on them.
Other mistake: In the first scenes of the film, we see the truck in which Jenco and Schmidt are going and moving away from Ghost, but while the truck is running we see Ghost inside it, sitting in front of the driver.
Other mistake: The grave that Clinton dug for "Mouser" was not even close to the recommended minimum depth of 3'. After placing the box in the hole, the cat's remains would have been within about a foot of ground level, which was close enough for the cat's scent to attract animals which might/will dig up the grave. The roots of Mouser's favorite tree should have interfered with the ability of Clinton to dig there without obstructions. Also, some states or local ordinances prohibit backyard burials of pets. (00:24:28)