Continuity: The recording of Jack's diatribe on yuppies is very different from the "live" version we saw earlier.
Continuity: When Jack dials Lydia's number, it's ended with "11". A couple minutes later, Anna is looking into the same phone book and dials the number ended with "38" or "30"
Continuity: Jack and Anne have a violent quarrel, upon which he grabs her from behind to calm her down. In the next shot, Anne is in Jack's arms facing him.
Audio/visual unsynchronized: After the little quarrel with Anne, Jack gets a call. When he picks up the phone, it still keeps ringing for a short moment.