Corrected entry: Dracula is repeatedly shown as having the ability to defy gravity. Given this, it makes no sense that Mary is able to hang him by his neck until the rising sun kills him. If he can defy gravity, he should easily be able to float upward and loosen and unwrap the cable from around his neck.
Corrected entry: In the scene where Dracula and Mary first meet face to face Dracula has a bruise on his cheek. In none of his previous scenes was he seen taking a blow to his cheek, and even if he had, it would have certainly healed considering he had been shot three times mere moments before and those wounds have already healed.