The Sony BMG German Jamiroquai website lists details of the High Times greatest hits album (see the Music section on the site), and reveals that a number of tracks will be "Remastered for 2006". All the songs apart from Little L are noted as being remastered, although the only thing that causes me to doubt this is the fact that the two new tracks are "remastered" too!
In addition to this information, the site states that the album will be released in Germany on 3 November and not 10 November as originally announced.