When Kenneth is first holding the Modern Leisure Appliances postcard picture side up, we see on the underside some smaller pictures of different variations of the doll. When he turns it over, it bears only blank space and the MLA contact info.
When Kenneth surprises Lisa in the office with the Chinese food, she removes her headphones. The headphones are then on and off in alternate shots.
The statue that Lisa hits Kenneth with bounces slightly when it falls on the ground, obviously made of rubber.
When Kenneth is first unwrapping Nikki, there are shots where there are differing amounts of Styrofoam packing material. One minute, a little, the next a lot.
In the subhead for the article from Lisa's 'zine, "Hunting for Mr Right," the word "step" should be "steps."