Other mistake: When Fergus finds Jude in his apartment (the scene in which she has coloured her hair red), Jude unholsters her 38 cal. and one can distinctly hear her cock the hammer. At the end of the scene, she places the gun in her purse with the hammer uncocked.
Continuity mistake: When Fergus first goes to the hair salon, his hair is much longer than it was in the previous scene.
Continuity mistake: At the end of the film, Dil lowers the gun twice after killing Jude and telling Fergus that she can't kill him because Jody won't let her.
Revealing mistake: About halfway through, when Dil throws the goldfish bowl out the window, the goldfish aren't flapping around on the ground, like they should do; they're either dead or fake fish.
Suggested correction: Of course, the fish are dead. They were thrown out an upper floor window, and the bowl smashed onto the street. The man even picks one up and yells "murderer" after he sees it dead.