Corrected entry: When Walter is delivering the skateboard to Cheryl's house, the door is answered by a guy who Walter assumes is her husband. Later we find out that his assumption was incorrect - that guy was just fixing her refrigerator. Except the repairman called out "Cheryl", then he yelled "Honey." First, since when do refrigerator repairmen answer the door to their customer's house? And even if they did, they'd never call her "Honey."
Correction: He called out honey because he could sense Walter fancied her, so he made it look like he was back in her life.
Corrected entry: In a scene early in the movie Ben Stiller is shown from behind showing a large bald spot on his head. This bald spot is seen twice in the scene. But all the other scenes where he is seen from behind there is no bald spot, he has a full head of hair.
Correction: His bald spot appears as he's imagining aging rapidly and turning into a small baby man. His hair thins as wrinkles appear of his face. This isn't a mistake, its the progression of his aging.
Correction: That wasn't a repairman. It was Cheryl's ex-husband, Phil, who had just come over to fix the fridge for her.
Bishop73