Visible crew/equipment: After Beauxbaton's entrance into the dining hall, Fleur bows in a close-up with the wood platform directly behind her, and then Dumbledore kisses Madame Maxime's hand. In the next shot, when Dumbledore quickly runs up onto the platform to introduce Durmstrang, there is a white mark on the wood which he promptly stands on. This mark is not on the platform in either the previous or following shots.
Visible crew/equipment: After Fred and George drink the aging potion and jump within the "age line", right before they say, "Ready?" and drop their names into the goblet, at the start of this shot the actor's T-mark is briefly visible on the floor, just before one of the twins promptly steps to that area. A bit of a second T-mark is briefly seen as well, to its right, also where the other twin soon stands.