Audio problem: When the leg lamp breaks, it makes a crashing sound like breaking glass, but then the wife asks "Jealous of a plastic lamp?" and it's obvious that the lamp is indeed soft plastic.
Audio problem: During the Santa scenes, Ralphie and his brother are lying in the fluff at the bottom of the slide. You can still hear kids screaming because of Santa. Nobody else is sent down the slide at that point and the camera pans up to see Santa with a calm little girl on his lap. Where are the screams coming from?
Audio problem: When Ralph and Randy are in line waiting for Santa, if you listen closely Santa keeps repeating the same lines like "And what do you want for Christmas, Billy?" "get him off my lap," "Santa can't wait all night let's go!" "HO HO HO!" but in the exact same tone, the child and Randy's screaming is also on repeat too.