When Green Lantern and Hawkgirl are pursuing the bank robbers, one of the robbers says, "Longjohns at ten o'clock." Ten o'clock is to the left and slightly ahead of the person; since GL and Hawkgirl are directly behind the robbers, the correct direction would be six o'clock.
When Simon Stagg angrily asks his limo driver Java to go faster, Java runs a red light. However, the arrangement of the lights on the signal are backwards: the green is on top, then yellow, then red on the bottom.
When John Stewart reunites with Rex Mason and meet up in Rex's apartment. They clearly drink from wine glasses. But as the scene change to Batman picking up a sample from the train, something happens with the glasses. Coming back to the same scene with John, Rex and Sappire. Now both John and Rex are holding a regular pint glass or similar, and haven't moved since last scene.
Cutting back to Batman again, for him to call John about his findings. As John confronts Rex about the incident. John has put his glass away and Rex is interrupted drinking from his. During their short conversation, Rex lowers both his arms and seems no longer to have a glass in his hands and nowhere, to have put it.