Lance's position behind the bar counter changes several times as Stumpy tells everyone about the '80s.
When Majors shows the employees of Bull Mountain their new uniforms, the jacket he holds up has the Team Snownook initials embroidered on it, even though the name Snownook hadn't been chosen yet.
During the King of the Mountain race, the amount of beer in the snowboarders' mugs changes frequently.
During "King of the Mountain", Rick is seen taking a drink that he holds in his mouth in order to win the race. A few frames later, after Jenny Flashes Pigpen, he's seen with an open mouthed smile looking at Pigpen after he's wiped out. He then does a flip and loses the rest of the beer in his mug. There's no way he could have smiled with all that beer in his mouth without losing it, but he still has beer at the end.
When they all the fired friends decide to skip town, they all raise their fist. Pig Pen has a hammer in one hand and he raises the other. In the next shot, he's raising the hand with the hammer in it.
The Alaska flag on the pole in Snownook is upside down throughout the movie.
When the guys start pushing the car to pull the prank on Luke, in one of the scenes shot from above you can see that the car does not leave any tire marks in the snow.
When the statue of Papa Muntz is sliding down the mountain at the climax of the film, you can see a cable held taut in front of the statue, supposedly controlling its decent.
When Anthony falls during the king of the mountain race, he swears quite audibly. However, when he turns over, he spits out a lump of snow which would have prevented him speaking so clearly.
Major's Hummer has a Dueck GM sticker on it, a Vancouver (where the movie was filmed) dealership - despite his Colorado license plate.
After the random drug test, Pigpen is heard saying, "I don't need to take a test to tell you I use drugs," but his is mouth never moves.
When the statue of Papa Muntz is sliding down the mountain at the climax of the film, you can see a cable held taut in front of the statue, controlling its descent.