A bit of a sticky wicket and a total mystery to me. – Only kevenz and I have noticed/reported English-audio sync problems on Colosseo Film’s Black Jack Blu-ray Disc.
All other forum members who posted about the Black Jack BD had no problems with its English audio track (makesthemovie, tomas).
Using the same equipment as for playing Blu-rays (Sony BDP S-1700 Blu-ray Disc / DVD player, JBL Bar Studio soundbar, Philips 6262 series TV), I’ve checked the English audio track on an older version of Black Jack I have (AVI file, runtime: 1:32:03) and on a recent rip (presumably) of Colosseo’s Blu-ray Disc (MKV). Both English audio tracks are perfectly in sync with their respective video tracks.
The Colosseo Black Jack Blu-ray Disc being the only disc I have with an audio sync problem and having no explanation whatsoever for that particular problem, I gave my copy to a friend last week and asked him to check the English audio track. He watched it on his son’s PlayStation and … yes, the English audio track is fine, flawlessly in sync.