When Nancy tells Bill she and Gramma will go caroling with him, he says "I'm gonna go grab my coat," but when they are actually seen caroling later on, Bill is not wearing a coat.
In "If I Can't Have Christmas," when Cricket says, "Snowmen I stabbed in their tinselstring guts," his eyebrows turn thin for a split second.
Cricket's pants change color
Remy's finger is missing it's outline
In the first scene, Cricket's regular overalls can be seen under his coat. But during "Good Deeds are Good Indeed" and in the rest of the episode, he wears black leggings like Tilly.
Chris Houghton confirmed on Tumblr that he did this on purpose, thinking nobody would notice.[1]
When Remy says, "Oh, it's Mr. Green!" one of his fingers is missing it's outline for a split second.
The face on the Big City Christmas star faces forward looking out in the direction of the ice rink, but when Cricket says he's going to replace it with a moon, the face is angled backward left to look at the screen.
Press releases said the episode had seven songs, but there were actually six (though it may have counted the carol Bill, Nancy and Gramma sing at Remington Manor).
Throughout the episode, the bar on Cricket's earmuffs constantly changes its orientation whenever he seen from the front. Sometimes it's leveled with his head, sometimes it's higher up on his head, and sometimes it cannot be visible at all.
While Bill is decorating the tree, he puts up ornaments featuring pictures of the family, but during the Christmas Day scene at the end, the pictures are not there.
When Cricket presents the "Christmas miracle", the top of the tree which is out of frame at the moment is glowing, suggesting a star is on top. However, it is later revealed Bill put the makeshift statue that Nancy and Gramma made there, which does not glow at all.
In addition, the star was on top of the tree in the opening scene, but it is replaced with the statue some time later with no thought.
Usually the department store is called Hudkins, but here it is spelt as "Hudkin's".
When Cricket rips up his list, he rips it in half, but when Tilly is amongst such it is in several remains.
When Cricket says "I see now that I'm doomed," he is looking at his reflection in an ornament, but there weren't any ornaments in the park to begin with.
Towards the end of "If I Can't Have Christmas", Cricket knocks over some statues of angels on the fountain, but before the song the statues were not there.
The wreath in the window behind the man Cricket slips up decreases in size when he spins it on one arm and throws it into a fire.
Tilly's naughty/nice list is shown to have two entries under the naughty column, but when she lets it go during "Christmas is Busted", there were three entries with the first taking two lines.
Also when Tilly lets her list go, the entries are bulleted, but they weren't bulleted at the beginning of the episode.
The heading of Tilly's name at the top is in all-caps, but when she lets it go it changed to sentence-caps and is cursive.
In the first scene of the Green house, there are footprints in the door path, but when Cricket lands next to Tilly, the footprints have disappeared.
Some of the naughty pranks Cricket pulls are illegal, and thus, he should've been arrested for them.
In this episode, Cricket only wants to do good deeds for the sake of wanting a present from Santa, but in "Skunked" he learns being a hero is for the sake of helping others and not the reward that comes with it.
The news shouldn't have immediately accused Tilly of knocking over the tree, since there should be surveillance cameras all over the city (EarthCam, for instance) that would've recorded all of Cricket's pranks, which included the tree getting knocked over.
Cricket strangely does not freak out at the "shelf-bound elf" despite being afraid of Henry the dummy in "Hiya Henry".
When the Greens are coming out of the house before the title appears, Nancy has no eyebrows. The same is when she and Bill find Cricket after he meets Santa.
One of the pictures Bill hangs on the tree shows Tilly holding Cricket as a baby, either from six months to a year old. In the same photo, she looks the same age as she does now, when she was about four or five years old when Cricket was that age, as shown in "Phoenix Rises".
When the camera zooms in on Cricket after he does a trial run of opening a present, one of the lights on the tree turns from red to green.
The lights on the tree are multicolored, but during the scene where Cricket sees his bad deed list, all the lights are red and green. Then in the end, the lights are multicolored again.
Cricket's mouth disappears
When Cricket and Tilly are wrestling over the star, Cricket's mouth disappears for a frame when he says "Now gimmie the star."
Maria has green eyeshadow, but in this episode, she does not.
When the tree crashes into the ice rink, nothing falls off of it; but when Cricket sings "And the tree took a dunk," several ornaments have fallen off, some having broke.
When Tilly says "Why did Santa give me presents?", her mouth disappears for a split second on "presents".
The Hudkins in this episode looks different than the one shown in "Parade Day", but it's possible it has multiple branches.
