When Wilma leaves the house she tells Fred, with Barney, she's "going over to Betty's." Right next door, that is - but only briefly after, during their confused attempt to open Alvin's trunk thinking Agatha was inside, at the sound of a car pulling up & stopping, Fred says "It's Wilma!" (which she then did come right in, but without any car sound leaving out, or necessity to have driven just next door!)
The bandage on Mr. Brickrock's head starts out on the right side, then later moves to the left side, then back to the right side, and disappears completely at the end.