I did further tests: I played the BD-RE into an old Philips BD-7100; all menu worked flawlessy, but movie stutters after few seconds of normal play; if I go to the next chapter, again movie plays normally then stutters... again and again.

So I cut a random 1 minute clip from the movie, with all soundtracks and subtitles intact, changed the profile from 4.1 to 4.0, replaced the main movie with this short clip, burned all to the BD-RE, replayed it in the BD-7100, and it worked!

Then I remuxed the whole movie at 4.0 profile, burned it to BD-RE, tested with the BD-7100, and... it didn't work - it was like the first time! But I noted that the trailer works well in both cases, I tested the initial and ending credits, and they were ok...

It's a bitrate problem, I thought... then I remembered I've done an AVCHD some years ago that has a bitrate over the standard, and it worked as this... plus, another member wrote that his standalone BD player recognized the BD as an AVCHD...

At the end, it seems that MultiAVCHD has made an AVHCD compliant disc, instead of a BD, even if I chose BD as the final format!!! I used MultiAVCHD 4.1 build 771.

Because the final structure seems to be BD compliant, how can I discover that is instead an AVCHD? Is there a free software that could "convert" the AVCHD structure to BD compliant, without re-encoding?