A close-up of Adrianna and Danielle's hug at the end of their first scene has Ade's head above Danielle's left shoulder, but the jump cut which follows has Ade's head above Danielle's right shoulder with no interruption in their hug.
When Chris shoots the police officer, we see two shots fired, but then he sets it up like it was a suicide. A person committing suicide would most likely not fire two shots at himself.
Paulie Walnuts calls Johnny Sack's cell phone collect from prison. Most cell phones cannot receive collect calls. There are pre-paid services that can forward a call onto a cell phone, but we only see Paulie dialing "0" on the jail's phone, which is the usual way to make a collect call.
When Tony starts to stash his loot, he lifts the glazed side of the floor plank. When he finishes, he lays down the unglazed side, immediately indicating which plank could be lifted.