Other mistake: If during a route you end up visiting Tom at home and provoke him in a mock fight, there's a screen with the graphic showing him in full figure...but cut above the knees.
Character mistake: In the "Tanya loves Luke" ending, there's a word missing from the on-screen display ("the" is omitted from "the whole population of London") - the voice acting properly uses it though.
Audio problem: It can be safely said that the dubbing of the game is on the cheap side. Not talking about the quality of the voice acting (not necessarily, at least...), but rather about the moment when at the first scene in the park a policeman receives a radio communication from another officer that appears in the transcript as "Bzzt...to all units, security code 1", with "bzzt" not being the radio sound effect, but rather the actor saying "Bzzt."