So the blu ray of THX is in DTS and the movie was never even released in DTS. The real version never was in Dolby as far as i know, but academy mono. So what if the directors cut dvd was in 5.1 that was not Walter Murch's awesome mix.

Not sure if a re-release ever came out after star wars 77 in Dolby. There is no info to confirm or deny. Though i bet the directors cut theatrical was in Dolby 5.1, or DTS.

American Graffiti's original mix is not on the DVD either, so Lucas has committed more alleged crimes against cinema than Star Wars.