When all the dogs are waiting in line to be groomed, Edward has Joyce's dog sitting on a single, long table; the only table visible before Joyce's dog is groomed. When Edward begins to groom Joyce's dog, a small, square table can be seen next to the table that Joyce's dog is supposedly sitting on. The longer table disappears. After Joyce's dog is groomed, the smaller table disappears, replaced with the longer table that Joyce's dog was originally sitting on.
When Edward first enters the Boggs' home, he accidentally pokes a hole in Kim's waterbed and covers it up with a stuffed animal. Later that night, Peg tucks him into the same waterbed that is not leaking. It doesn't leak water again until Kim comes home from her trip and scares Edward.
When Peg first brings Edward to her house, she clearly parks her vehicle on the left side of the house. When everyone is seen gathering around the corner, the car is no longer there, though Peg has not left the house.
After receiving a phone call, Joyce looks for something to wear, throwing clothes on her bed behind her. She grabs a burgundy colored article of clothing, but, when she meets her friends on the corner, she is wearing yellow and green.
When Peg leaves Edward to answer the phone after she gives him the clothes, she (obviously) leaves the room. Just as she is about to walk back into the room, white cue tape placed right where Peg stands is visible.
In the first shot of the husbands driving off to work, the house next to the Esmeralda's is being tented. The next day the women are at Peg's door and the house is visible without the tent. Fumigation requires 72 hour tenting.
At the time of the break-in at Jim's house, Edward is wearing dark clothes and a cap unlike what he can be seen wearing at other times throughout the film. He has previously demonstrated an inability to dress himself, and with this in mind it is strange that everybody assumes that he committed the burglary by himself.