I noticed that there are a bunch of DVDs listed for release that have already been released. Examples include Blow, Donnie Darko, The Deep End, and a couple more. See Amazon and a bunch of other sites, which all have these titles marked as "pre-order." Is the content of these "new" releases different from the already existing discs, either adding or dropping features? Or are their respective studios changing the suggested price and this is being treated for some reason as a "new" release?