51:30 into the movie, the amount of cocaine on Nick's nose changes during the end of the big drug deal scene.
When Casey and Ice are smoking marijuana in the kitchen, the lighter disappears and reappears between cuts.
When Casey walks onto his front lawn to get the morning paper he takes at least 9 steps in the grass. Then he gets caught off guard when in the sprinkler comes on, and he takes only 3 little hops to get back onto the sidewalk. Although he obviously came from a different direction.
When Dalles gets up from the ground in front of Casey, it's visible that she is wearing white panties underneath the red dress. But later when she undresses before raping him, she only takes off the red dress, no white panties.
Time on the clock in the kitchen is different from the time shown at the title of next chapter in most of the chapters (time shown is usually significantly before the one in the title)
When Casey discovers the hidden money, it is first shown as a single pack of a stack of $100 bills. As he pulls it from the trunk, it has changed to three stacks in the package.
The sound of the air flowing through the water in the bong is fake (bubbling). The bubbling starts before Casey puts his mouth to the chamber.