Many of the syndicated episodes from the American DVD sets are further edited to remove music and songs which were claimed too expensive to license for home video. In a few cases, this results in episodes which run for less than 20 minutes! The European sets released by Warner does not suffer from these problems.
For syndication the episodes were cut down to 21 minutes. These edited versions were used for the US DVD release, while the European sets featured the 24 minute full length episodes.