When Steve and Linda are washing dishes they break a dish. They bend down to clean it up and end up sitting on the floor. At first they are several feet apart (enough space for a broken dish). Suddenly they are close enough to kiss.
When Debbie and Pamela are fighting over Debbie's video date and he is listening to them through a nearby window, it is clear in the next shot that there are no windows nearby, just a door.
For Debbie's flight, the ticket agent assigns her seat 3C. On the actual flight, she is seated in a window seat on the left side of the plane, which would be seat A, not C.
When Cliff's band mate starts to read the review of their record he says "Once again when the shirtless Cliff Poncier begins to sing." But when the camera shows the article you can see that the review says "begins singing" instead.
Debbie's frantic bike ride on her video date has her darting all over the city. She starts at the first restaurant at the end of lake union. To get to the second restaurant on first avenue downtown, she circles all the way around to Waterfront park on the Sound. After leaving the second restaurant, she crosses a draw bridge over the ship canal, only to suddenly end up back downtown near post alley and first avenue (where she just left the second restaurant). After getting a flat tire, she finally walks all the way home to the apartment on Capitol Hill (nearly 2 miles away).
Debbie doesn't tell the "Expect The Best" clerk her name before he calls her "Debbie".
After Steve and Linda have water in the restaurant, he offers to giver her a ride back to work. As he is letting her in the passenger side, the boom mic is visible in the rear window of the car.