In the early part of the story it is mentioned that the bags of stolen money also contain blue dye packs that will explode upon leaving the bank premises. A while later, while the team is searching a suspect's house, Buzz inspects a kitchen trash can only to set off one of the dye packs. His face becomes half-covered with the blue dye, but during the following scenes in the Major Crimes office (and for the rest of the show), the dye is now green. This change to green fits in better with the Christmas theme of the story (and a co-worker points that out), but they should have stuck with the blue color as originally stated in the script.
After Sharon says good bye to her three children, she leaves the wrong way out of her apartment. In previous episodes the way she walks is straight down to the bedrooms. The front door is in the other direction.