There is another cut of film called Human Traffic Remixed. According to The Guardian there were rumors that Justin Kerrigan wasn't involved with edited version but the producer Allan Niblo was. There are also rumors that they had fallen out during the shoot. It is available on DVD in the UK
When Jip first picks up Koop in his car you here the radio broadcast of BBC's Radio One. The MC is Pete Tong, who is the movie's Music Supervisor. Pete Tong actually does have a weekly radio show on Radio One.
When Jip talks to the manager of the Asylum, Jip asks to use the phone to call his assistant. While he is on the phone, the camera flicks back the manager. In this shot, the phone Jip is supposed to be calling on is clearly visible in the foreground, still on the hook.
When Koop is selling records to the hip hop guy in the beginning of the movie, the needle jumps. The last time that we see Hip Hop Guy from Koop's perspective, the needle has jumped onto the slipmat, and then in the next shot, the needle jumps back off the slipmat.
When the gang are in the pub and Jip realizes he fancies Lulu, he looks over and she lights her cigarette and has a puff. But then it switches to a wider shot and you can see Lulu lights her cigarette again.
Jip: [after discussing the huge phonebill Moff ran up after a drunken phone-sex session]
How many times have I told ya, get your own fucking flat. Get your own flat man, you need your own flat. It's a piece of piss, you can get it on the social.