When the Family are in London the Union Flags surrounding the building are ALL upside down.
In the very beginning of the movie, three bats play J.S. Bach's "Toccata et Fuga" (BWV 565), yet the keys they push do not match even closely those which would have to be played.
In the English version DVD's "In Order of Appearance" part of the closing credits, the characters are listed correctly; however, Nick Frost (who voiced Frank), was listed as playing Dracula. Conversely, Jason Isaacs, who voiced Dracula, was credited as Frank.