the issue is still under investigation, our main concern is that we have just been unable to reproduce the problem. For our tests we use a panel of 17 DVD players that all work flawlessly with the subtitles (even after 1st chapter), but of course, the fact it work like a charm @VSO doesn't solve your problem.
To fix a bug, we always need the conversion log and when it's related to something not working on a standalone DVD player, we need the brand and model of that player.
We are trying as hard as we can to solve any issues that are reported to us, but sometimes it's not possible, because of the reluctancy of some users to provide information we need, and the possibility for us to find/purchase the proper hardware (dvd player).
What we can say with the current information we have is that we will check and try to solve this issue as hard as we can.
Please understand that reading in several forums we are unable to do what "lots of other software can do [it] with no problems, often for free" doesn't really help us solving the problem.
If one's got valuable information we need on this issue, we are all ears, info(remove)@(remove)vso-software.fr