The British Board of Film Classification website has been updated to say that Warner Brothers submitted a new Half-Blood Prince trailer for them to review.
As of yesterday the 1 minute 31 seconds trailer was passed with a PG (Parental Guidance) rating. This does not mean that the movie will be PG, just the trailer.

Thanks SS!

UPDATE: WB has let SS know that “there will be no new trailer released for the sixth film at the present time.”

Filed Under: Half-Blood Prince