Continuity mistake: When Power Man is wearing White Tiger's tiara (her Christmas gift), he has it on point-side down. White Tiger grabs it with both hands and puts it on and it's now point-side up, without her flipping it. You also see it go from a partial band tiara to a fully enclosed band tiara, like a crown.
Continuity mistake: Rhino smashes through a building, while carrying the Hulk, next to the bakery with the pink facade. In the next shot the building is fine and the bakery window is broken. Then when the Hulk smashes Rhino back through the same building, there's no damage at all and the building next to the bakery says Bank and has a green facade.