Fireball

Corrected entry: When we initially see Voldemort near Hogwarts he is wearing a black cloak, yet, in the battle scene it suddenly changes to light blue.

Fireball

Correction: It's still black...the moonlight makes it look lighter.

Corrected entry: When Harry first yells at Snape in Hogwarts, he is wearing a school cloak, yet after Snape leaves he is wearing his jacket and shirt.

Fireball

Correction: He was wearing the cloak over his own clothes to blend into the crowd. After revealing his presence, he no longer needed to disguise himself and cast the cloak off. He is seen doing so when McGonagall relights the Great Hall. It's lying on the floor.

Phixius